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GT5SLCD2S-2A 标准矢量字库芯片
GT5SLCD2S-2A
标准矢量字库芯片
V 1.0_A
2020-08
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GT5SLCD2S-2A 标准矢量字库芯片
版本修订记录
版本号
修改内容
日期
V 1.0
字库说明书的制定
2020-07
V 1.0_A
更新宋体字符编码
2020-08
备注
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GT5SLCD2S-2A 标准矢量字库芯片
目
录
1 概述·························································································································5
1.1 芯片特点···································································································································· 5
1.2 芯片内容···································································································································· 6
1.3 主控资源占用······························································································································· 7
1.4 建议字库芯片硬件规格及连接方式···································································································· 7
1.5 显示方式对刷屏速度的影响及建议····································································································7
1.6RAM 资源使用建议·························································································································8
1.7 灰度字混合背景与内存关系············································································································· 8
1.8 字体显示流程······························································································································· 9
1.9 叠加背景效果图··························································································································· 10
2 操作指令················································································································· 12
2.1 Instruction Parameter(指令参数)·····································································································12
2.2 Read Data Bytes(一般读取)·······································································································12
2.3 Read Data Bytes at Higher Speed(快速读取数据)·········································································· 13
2.4 读芯片状态时序··························································································································14
2.5 深度睡眠模式指令(B9H)············································································································14
2.6 唤醒深度睡眠模式指令(ABH)····································································································· 14
3 引脚描述与电路连接·································································································· 15
3.1 引脚配置···································································································································15
3.2 引脚描述···································································································································15
3.3 SPI 接口与主机接口参考电路示意图································································································· 16
4 电气特性················································································································· 17
4.1 绝对最大额定值···························································································································17
4.2 DC 特性···································································································································· 17
4.3 AC 特性·····································································································································17
4.4 上电时序····································································································································19
5 封装尺寸················································································································· 20
6 样张························································································································ 21
6.1ASCII 码字型样张·························································································································21
6.2 中文字型样张······························································································································24
6.3 外文字型样张······························································································································25
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GT5SLCD2S-2A 标准矢量字库芯片
7.附表(矢量字库选型表-全)·························································································26
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GT5SLCD2S-2A 标准矢量字库芯片
1 概述
GT5SLCD2S-2A是一款支持16-192点阵的矢量字库芯片,使用灰度算法使汉字边缘变得比纯点
阵字更加柔和、平滑。采用高通超小型嵌入式矢量字库,具有字体平滑及不失真等特点,可以产生
多种高质量的文字输出,可以支持加粗、倾斜、反白、阴影等文字特效,支持ASCII码字符、拉丁文、
中文汉字。用户通过字符内码,利用我司所提供库文件内的函数接口可直接读取该内码的点阵信息。
1.1 芯片特点
数据总线:SPI 串行总线接口
时钟频率:45MHz(max.)@3.3V
工作电压:2.7V~3.6V
电流:
工作电流:5 -15mA
睡眠电流:1-5uA
工作温度:-40℃~85℃
封装: DFN8 2X3
字符集:
GBK
中文
GB18030 中文(宋)
ASCII 码
拉丁文
字号: 16-192
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GT5SLCD2S-2A 标准矢量字库芯片
1.2 芯片内容
字符集
ASCII
中文
外文
转码表
字体
支持编码
字号
灰度
数据类型
线型
ASCII /UNICODE
16-192
4bit+
矢量
圆角
ASCII /UNICODE
16-192
4bit+
矢量
白斜
ASCII /UNICODE
16-192
4bit+
矢量
方斜
ASCII /UNICODE
16-192
4bit+
矢量
长黑
ASCII /UNICODE
16-192
4bit+
矢量
打字
ASCII /UNICODE
16-192
4bit+
矢量
美术
ASCII /UNICODE
16-192
4bit+
矢量
手写
ASCII /UNICODE
16-192
4bit+
矢量
正圆
ASCII /UNICODE
16-192
4bit+
矢量
黑正
ASCII /UNICODE
16-192
4bit+
矢量
歌德
ASCII /UNICODE
16-192
4bit+
矢量
时钟体
ASCII /UNICODE
16-192
4bit+
矢量
宋体
GB18030
16-192
4bit+
矢量
黑体
GBK/UNICODE
16-192
4bit+
矢量
拉丁文_圆角
UNICODE
16-192
4bit+
矢量
UNICODE->GBK
BIG5->GBK
备注:标准版本支持 16-128、自定义版本支持 16-192;
灰度 4bit+只支持 48 点以下字号,64、96 支持 2bit,128、192 支持 1bit。
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1.3 主控资源占用
资源占用表
字号(16-192)
RAM 资源:
4.8KByte
字号(16-128)
RAM 资源:
3.8 KByte
ROM 资源:
客户接收缓存
RAM:
11.5KByte
ROM 资源:
11.5KByte
2KByte
客户接收缓存
RAM:
4.5KByte
1.4 建议字库芯片硬件规格及连接方式
字库硬件规格及连接方式配置
标准版(字号 16-128 点)
MCU 主频:
字库芯片连接的 SPI:
自定义版本(字号 16-192 点)
48MHz
硬件 SPI 外设,
外设频率 8M 及以上
MCU 主频:
字库芯片连接的 SPI:
64MHz
硬件 SPI 外设,
外设频率 8M 及以上
RAM 资源:
8KB
RAM 资源:
16KB
ROM 资源:
16KB
ROM 资源:
32KB
客户接收缓存 RAM:
2KB
客户接收缓存 RAM:
4.5KB
1.5 显示方式对刷屏速度的影响及建议
显示终端驱动硬件及连接方式推荐配置表
硬件及连接方式:
硬件 SPI 速率:
刷屏方式:
使用并口方式或硬件 SPI 外设方式驱动显示终端
8M 或以上
推荐使用区域刷屏
下表是不同 SPI 速率、不同的刷屏方式对屏幕刷新速度的影响:
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GT5SLCD2S-2A 标准矢量字库芯片
SPI 频率
时间
字号
显示方式
SPI 频率
时间
字号
显示方式
8MHz
≈9.54Ms
20
区域刷屏
8MHz
≈19.563Ms
20
打点
4MHz
≈10.91Ms
20
区域刷屏
4MHz
≈21.669Ms
20
打点
2MHz
≈13.49Ms
20
区域刷屏
2MHz
≈25.319Ms
20
打点
1MHz
≈18.71Ms
20
区域刷屏
1MHz
≈33.074Ms
20
打点
1.6RAM 资源使用建议
如果 RAM 资源足够的情况下,尽量将需要叠加部分的背景读入到 RAM 进行混合。或者读入
到 MCU 的 FLASH 部分进行混合。建议将一屏所显示的字全部读入到 RAM 当中处理,然后一次
性刷入到屏幕当中。这样做可以提高数据送入显示终端中的速度,改善终端客户体验。
1.7 灰度字混合背景与内存关系
颜色或者背景叠加:只进行一次叠加,背景尽量使用色彩变化不大的背景。使用背景颜色值
平均算法,可以在不进行大量的背景数据读取的情况下进行混合,而不降低显示质量。提高显示
速度的同时也可以节约大量内存。
( 参考公式:[W 点阵数] x [H 点阵数] x 2 x 混合字符数 )
点阵数
混合字符数/所需 RAM
混合字符数/所需 RAM
18
10/6480(字节)
20/12960(字节)
20
10/8000(字节)
20/16000(字节)
24
10/11520(字节)
20/23040(字节)
28
10/15680(字节)
20/31360(字节)
32
10/20480(字节)
20/40960(字节)
48
5/23040(字节)
10/46080(字节)
64
5/40960(字节)
10/81920(字节)
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GT5SLCD2S-2A 标准矢量字库芯片
1.8 字体显示流程
1.8.1 黑底白字或白底黑字使用流程
1.8.2 其他颜色背景和其他颜色文字使用流程
备注:具体流程详见技术人员提供的使用说明文档;
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1.9 叠加背景效果图
叠加背景效果图
示例图
1.无背景叠加
2.单色背景
(读出灰度数据后采用和单一背景颜色进行一次
叠加的方式)
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3.色差不大的背景
(读出一行或者数行算出一个背景近似平均
值,使用该值进行一次叠加的方式)
4.色差较大的背景
(例如头发和皮肤的颜色的这种色差。建议将
整个背景读取出来和汉字数据进行叠加)
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GT5SLCD2S-2A 标准矢量字库芯片
2 操作指令
2.1 Instruction Parameter(指令参数)
Instruction
Code(One-Byte)
Instruction
Description
READ
Read Data Bytes
0000 0011
FAST_READ
Read Data Bytes
at Higher Speed
0000 1011
Address
Bytes
Dummy
Bytes
Data
Bytes
03 h
3
—
1 to ∞
0B h
3
1
1 to ∞
所有对本芯片 SPI 接口的操作只有 2 个,那就是 Read Data Bytes (READ “一般读取”)和 Read
Data Bytes at Higher Speed (FAST_READ “快速读取点阵数据”)。.
2.2 Read Data Bytes(一般读取)
Read Data Bytes 需要用指令码来执行每一次操作。READ 指令的时序如下(图):
首先把片选信号(CS#)变为低,紧跟着的是 1 个字节的命令字(03 h)和 3 个字节的地
址和通过串行数据输入引脚(SI)移位输入,每一位在串行时钟(SCLK)上升沿被锁存。
然后该地址的字节数据通过串行数据输出引脚(SO)移位输出,每一位在串行时钟(SCLK)
下降沿被移出。
读取字节数据后,则把片选信号(CS#)变为高,结束本次操作。
如果片选信号(CS#)继续保持为底,则下一个地址的字节数据继续通过串行数据输出引脚
(SO)移位输出。
图:Read Data Bytes (READ) Instruction Sequence and Data-out sequence:
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2.3 Read Data Bytes at Higher Speed(快速读取数据)
Read Data Bytes at Higher Speed 需要用指令码来执行操作。READ_FAST 指令的时序如下(图):
首先把片选信号(CS#)变为低,紧跟着的是 1 个字节的命令字(0B h)和 3 个字节的地
址以及一个字节 Dummy Byte 通过串行数据输入引脚(SI)移位输入,每一位在串行时钟
(SCLK)上升沿被锁存。
然后该地址的字节数据通过串行数据输出引脚(SO)移位输出,每一位在串行时钟(SCLK)
下降沿被移出。
如果片选信号(CS#)继续保持为底,则下一个地址的字节数据继续通过串行数据输出引
脚(SO)移位输出。例:读取一个 15x16 点阵汉字需要 32Byte,则连续 32 个字节读取后
结束一个汉字的点阵数据读取操作。
如果不需要继续读取数据,则把片选信号(CS#)变为高,结束本次操作。
图:Read Data Bytes at Higher Speed (READ_FAST) Instruction Sequence and Data-out
sequence:
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2.4 读芯片状态时序
2.5 深度睡眠模式指令(B9H)
一旦字库芯片进入深度睡眠模式,所有的命令将被忽略,除了唤醒深度睡眠模式指令,首先
首先 CS#为低电平,输入 B9H 命令,然后然后 CS#变为高电平并持续 TDP 的时间(TDP=25us),
在 TDP 的持续时间内,字库芯片进入深层关机模式。
深度睡眠模式指令的时序波形图
2.6 唤醒深度睡眠模式指令(ABH)
首 先 CS# 为 低 电平 , 向 字 库芯 片 发 送 ABH 指 令 ,然 后 CS# 变 为 高电 平 并 持 续 Tres1 的 时 间
(Tres1=25us),字库芯片将恢复正常运行,CS#引脚必须在 Tres1 时间内保持高电平。
唤醒深度睡眠模式指令的时序波形图
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3 引脚描述与电路连接
3.1 引脚配置
DFN8 2X3
3.2 引脚描述
DFN8 2X3
NO.
名称
I/O
1
GND
2
NC
3
SI
I
串行数据输入 (Serial data input)
4
SCLK
I
串行时钟输入(Serial clock input)
5
HOLD#
I
总线挂起(Hold, to pause the device without)
6
VDD
7
CS#
I
片选输入(Chip enable input)
8
SO
O
串行数据输出 (Serial data output)
描述
地(Ground)
悬空
电源(+ 3.3V Power Supply)
串行数据输出(SO):该信号用来把数据从芯片串行输出,数据在时钟的下降沿移出。
串行数据输入(SI):该信号用来把数据从串行输入芯片,数据在时钟的上升沿移入。
串行时钟输入(SCLK):数据在时钟上升沿移入,在下降沿移出。
片选输入(CS#):所有串行数据传输开始于CS#下降沿,CS#在传输期间必须保持为低电平,
在两条指令之间保持为高电平。
总线挂起输入(HOLD#):
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该信号用于片选信号有效期间暂停数据传输,在总线挂起期间,串行数据输出信号处于高阻态,
芯片不对串行数据输入信号和串行时钟信号进行响应。
当HOLD#信号变为低并且串行时钟信号(SCLK)处于低电平时,进入总线挂起状态。
当HOLD#信号变为高并时串行时钟信号(SCLK)处于低电平时,结束总线挂起状态。
3.3 SPI 接口与主机接口参考电路示意图
SPI 与主机接口电路连接可以参考下图(HOLD#管脚建议接 2K 电阻 3.3V 拉高)。
GT5X
SPI 接口与主机接口参考电路示意图
16
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GT5SLCD2S-2A 标准矢量字库芯片
4 电气特性
4.1 绝对最大额定值
Symbol
Parameter
Min.
Max.
Unit
TOP
Operating Temperature
-40
85
℃
TSTG
Storage Temperature
-65
150
℃
VDD
Supply Voltage
-0.3
3.6
V
VIN
Input Voltage
-0.3
VDD+0.3
V
GND
Power Ground
-0.3
0.3
V
Condition
4.2 DC 特性
Condition:TOP =-40℃ to 85℃,GND=0V
Symbol
Parameter
Min.
Max.
Unit
Condition
IDD
VDD Supply Current(active)
5
15
mA
ISB
VDD Standby Current
5
15
uA
/CS=VDD,VIN=
VDD or VSS
Icc2
Deep Power-Down
Current
1
5
uA
/CS=VDD,VIN=
VDD or VSS
VIL
Input LOW Voltage
-0.5
0.2VDD
V
VIH
Input HIGH Voltage
0.7VDD
VDD+0.4
V
VOL
Output LOW Voltage
0.4
(IOL=1.6mA)
V
VDD=2.7~3.6V
VOH
Output HIGH Voltage
VDD-0.2
(IOH=-100uA)
ILI
Input Leakage Current
0
±2
uA
ILO
Output Leakage Current
0
±2
uA
V
Note:IIL:Input LOW Current,IIH:Input HIGH Current,
IOL:Output LOW Current,IOH:Output HIGH Current,
4.3 AC 特性
Symbol
Alt.
Parameter
Min.
Max.
Unit
Fc
Fc
Clock Frequency
D.C.
50
MHz
tCH
tCLH
Clock High Time
4
ns
tCL
tCLL
Clock Low Time
4
ns
tCLCH
Clock Rise Time(peak to peak)
0.2
V/ns
tCHCL
Clock Fall Time (peak to peak)
0.2
V/ns
CS# Active Setup Time (relative to SCLK)
5
ns
CS# Not Active Hold Time (relative to SCLK)
5
ns
tSLCH
tCSS
tCHSL
tDVCH
tDSU
Data In Setup Time
2
ns
tCHDX
tDH
Data In Hold Time
5
ns
17
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GT5SLCD2S-2A 标准矢量字库芯片
t CHSH
CS# Active Hold Time (relative to SCLK)
5
ns
t SHCH
CS# Not Active Setup Time (relative to SCLK)
5
ns
20
t SHSL
tCSH
CS# Deselect Time
130
ns
t SHQZ
tDIS
Output Disable Time
7
ns
t CLQV
tV
Clock Low to Output Valid
6
ns
t CLQX
tHO
5
ns
Output Hold Time
1
t HLCH
HOLD# Setup Time (relative to SCLK)
5
ns
t CHHH
HOLD# Hold Time (relative to SCLK)
5
ns
t HHCH
HOLD Setup Time (relative to SCLK)
5
ns
t CHHL
HOLD Hold Time (relative to SCLK)
5
ns
t HHQX
tLZ
HOLD to Output Low-Z
6
ns
t HLQZ
tHZ
HOLD# to Output High-Z
6
ns
18
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GT5SLCD2S-2A 标准矢量字库芯片
4.4 上电时序
Symbol
Parameter
Min
Max
unit
T VSL
VCC(min)To/CS Low
10
T PUW
Time Delay From VCC(min)To Write Instruction
1
10
ms
VWI
Trite Inhibit Voltage VCC(min)
1
2.5
v
us
19
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GT5SLCD2S-2A 标准矢量字库芯片
5 封装尺寸
封 装 类 型
封装尺寸
DFN8-2X3
2.0mmx 3.0mm
DFN8-2X3
20
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GT5SLCD2S-2A 标准矢量字库芯片
6 样张
6.1ASCII 码字型样张
线形
圆角
白斜
方斜
21
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GT5SLCD2S-2A 标准矢量字库芯片
长黑
打字
美术
22
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GT5SLCD2S-2A 标准矢量字库芯片
手写
正圆
黑正
歌德
23
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GT5SLCD2S-2A 标准矢量字库芯片
时钟体
6.2 中文字型样张
宋体
24
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GT5SLCD2S-2A 标准矢量字库芯片
黑体
6.3 外文字型样张
拉丁文_圆角
25
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GT5SLCD2S-2A 标准矢量字库芯片
7.附表(矢量字库选型表-全)
语言
字体
大小
样张图(参考 32 点)
圆角
线形
白斜
方斜
长黑
打字
ASCII
黑正
美术
手写
16-192
正圆
歌德
时钟体
宋体
中文
仿宋
楷体
黑体
拉丁文
圆角
26
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深圳高通半导体有限公司
GT5SLCD2S-2A 标准矢量字库芯片
深圳 OFFICE
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电话: 0755-83453881 83453855
传真: 0755-83453855-8004
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