sh66l16a SinoWealth Micro-Electronics Corp. Ltd, sh66l16a Datasheet - Page 18

• Manufacturer Part Number: sh66l16a
• Description: 16k 4-bit Low Power Micro-controller With Lcd Driver
• Manufacturer: SinoWealth Micro-Electronics Corp. Ltd

11. LCD Driver
The LCD driver contains a controller, a voltage generator, 8 common driver pads, and 56 segment driver pads. There are two
different driving programmable modes: 1/4 duty and 1/3 bias, 1/8 duty and 1/4 bias. The controller consists of display data RAM
and a duty generator.
The LCD data RAM is a dual port RAM that transfers data to segment pads automatically without a program control. The LCD
RAM can be used as data memory if needed.
The LCD SEG49 - 56 can also be used as I/O ports (PORTD & PORTE), it is selected by the Bit1-0 of the system register $14.
The LCD COM5 - 8 can also be used as I/O port (PORTF), it is selected by Bit2 of the system register $14.
If the “ System Clock selection” code option is equal to CK = 0,0 (200kHz RC as system clock with 32.768kHz Crystal for the
Base Timer), or CK = 0,1 (200kHz RC as system clock with 32kHz RC for the Base Timer), the LCD driver clock comes from the
OSC oscillator. So the LCD can display on even in the STOP mode if the BTM register value (Bit2 - 0 of the system register $03
is non-zero.
If the “ System Clock selection” code option is equal to CK = 1,0 (32.768kHz Crystal as system clock), or CK = 1,1 (200kHz RC
as system clock), the LCD driver clock comes from the system clock. When the “STOP” instruction is executed, the LCD will be
turned off, but the data of LCD RAM keeps the value.
When the LCD display is off, both the COM and the SEG output low.
Configuration of LCD RAM Area: (SEG1 - 56, 1/8duty)
Address
$30A
$30B
$30C
$30D
$30E
$300
$301
$302
$303
$304
$305
$306
$307
$308
$309
$30F
$310
$311
$312
$313
$314
$315
$316
$317
$318
$319
SEG10
SEG11
SEG12
SEG13
SEG14
SEG15
SEG16
SEG17
SEG18
SEG19
SEG20
SEG21
SEG22
SEG23
SEG24
SEG25
SEG26
COM4
SEG1
SEG2
SEG3
SEG4
SEG5
SEG6
SEG7
SEG8
SEG9
Bit 3
SEG10
SEG11
SEG12
SEG13
SEG14
SEG15
SEG16
SEG17
SEG18
SEG19
SEG20
SEG21
SEG22
SEG23
SEG24
SEG25
SEG26
COM3
SEG1
SEG2
SEG3
SEG4
SEG5
SEG6
SEG7
SEG8
SEG9
Bit 2
SEG10
SEG11
SEG12
SEG13
SEG14
SEG15
SEG16
SEG17
SEG18
SEG19
SEG20
SEG21
SEG22
SEG23
SEG24
SEG25
SEG26
COM2
SEG1
SEG2
SEG3
SEG4
SEG5
SEG6
SEG7
SEG8
SEG9
Bit 1
SEG10
SEG11
SEG12
SEG13
SEG14
SEG15
SEG16
SEG17
SEG18
SEG19
SEG20
SEG21
SEG22
SEG23
SEG24
SEG25
SEG26
COM1
SEG1
SEG2
SEG3
SEG4
SEG5
SEG6
SEG7
SEG8
SEG9
Bit 0
18
Address
$33A
$33B
$33C
$33D
$33E
$34A
$34B
$34C
$34D
$34E
$34F
$338
$339
$33F
$340
$341
$342
$343
$344
$345
$346
$347
$348
$349
$350
$351
SEG10
SEG11
SEG12
SEG13
SEG14
SEG15
SEG16
SEG17
SEG18
SEG19
SEG20
SEG21
SEG22
SEG23
SEG24
SEG25
SEG26
COM8
SEG1
SEG2
SEG8
SEG9
SEG3
SEG4
SEG5
SEG6
SEG7
Bit 3
SEG10
SEG11
SEG12
SEG13
SEG14
SEG15
SEG16
SEG17
SEG18
SEG19
SEG20
SEG21
SEG22
SEG23
SEG24
SEG25
SEG26
COM7
SEG1
SEG2
SEG3
SEG4
SEG5
SEG6
SEG7
SEG8
SEG9
Bit 2
SEG10
SEG11
SEG12
SEG13
SEG14
SEG15
SEG16
SEG17
SEG18
SEG19
SEG20
SEG21
SEG22
SEG23
SEG24
SEG25
SEG26
COM6
SEG1
SEG2
SEG3
SEG4
SEG5
SEG6
SEG7
SEG8
SEG9
Bit 1
SH66L16A
SEG10
SEG11
SEG12
SEG13
SEG14
SEG15
SEG16
SEG17
SEG18
SEG19
SEG20
SEG21
SEG22
SEG23
SEG24
SEG25
SEG26
COM5
SEG1
SEG2
SEG3
SEG4
SEG5
SEG6
SEG7
SEG8
SEG9
Bit 0