sh6613d SinoWealth Micro-Electronics Corp. Ltd, sh6613d Datasheet - Page 17

• Manufacturer Part Number: sh6613d
• Description: 4k 4-bit Microcontroller With Lcd Driver
• Manufacturer: SinoWealth Micro-Electronics Corp. Ltd

11. LCD Driver
The LCD driver contains a controller, a voltage generator, 4 common signal pins and 34 segment driver pins, 1/4 duty and 1/3
bias.
The LCD SEG1~30 can also be used as output port, it is selected by the bit 2 of the system register $16. When SEG1~30 is to
be output port, you write data to bit 0 of the same addresses (350H-36DH). LCD RAM could be used as data memory if you
need. When the "STOP" instruction is executed, the LCD will be turned off, but the data of LCD RAM keeps the same value
before executing the "STOP" instruction.
11.1 LCD Control Register
Frame frequency=LCDCLK/16
Frame frequency for 1/8 duty; 1/4 duty has the same frequency cycle.
The clk before (#) is sleeted as CPU system clk.
Frame frequency=LCDCLK/16 (32Hz)When LCD is set SCAN OUT, COMx are pulled high. It is easy to implement the keyboard
scan.
When CPU is in STOP mode, the COMx and SEGx are pulled low. It can easily be waken up by keyboard scan (Port interrupt).
When CPU is in HALT mode, the COMx and SEGx are normal. It can easily be waken up by base timer ﹑ timer0 or port interrupt.
OSC=32kHz,
OSC=262kHz,
OSC=262kHz ,
OSC=32kHz,
OSC=32kHz,
OSC=262kHz ,
OSC=32kHz (#),
OSC=262kHz (#),
OSC=32kHz (#),
OSC=262kHz (#),
OSC=32kHz(#),
OSC=262kHz (#),
Add.
LCDOFF: LCD on/off switch.
LPS1, LPS0: LCD clock frequency control
*System clock= Instruction cycle time
$15
CLK Frequency
OSCX=455kHz (#)
OSCX=455kHz (#)
OSCX=1.8MHz (#)
OSCX=1.8MHz (#)
0: LCD on.
0,0: LCDCLK = OSC/64
0,1: LCDCLK = OSC/512
1,0: LCDCLK = System clock/512
1,1: LCDCLK = System clock/4096
OSCX=2MHz (#)
OSCX=2MHz (#)
LPS1
OSCX=1.8MHz
OSCX=455kHz
OSCX=1.8MHz
OSCX=455kHz
Bit 3
OSCX=2MHz
OSCX=2MHz
LPS0
Bit 2
256Hz
256Hz
256Hz
256Hz
256Hz
256Hz
32Hz
32Hz
32Hz
32Hz
32Hz
32Hz
0,0
17/33
1: LCD off.
LCDOFF
Bit 1
32Hz
32Hz
32Hz
32Hz
32Hz
32Hz
4Hz
4Hz
4Hz
4Hz
4Hz
4Hz
0,1
LPS1, LPS0
14Hz
55Hz
61Hz
14Hz
55Hz
61Hz
8Hz
1Hz
1Hz
1Hz
8Hz
8Hz
1,0
Should be set "1"
Bit 0
1.7Hz
6.9Hz
7.6Hz
1.7Hz
7.6Hz
1/8Hz
1/8Hz
1/8Hz
6.9Hz
1Hz
1Hz
1Hz
1,1
SH6613D
V1.0