BS85B12-3 HOLTEK [Holtek Semiconductor Inc], BS85B12-3 Datasheet - Page 152

• Manufacturer Part Number: BS85B12-3
• Description: Touch Key Flash Type 8-Bit MCU with LCD/LED Driver
• Manufacturer: HOLTEK [Holtek Semiconductor Inc]

LED Driver
Rev. 1.00
Bit 7~6
Bit 5~0
Bit 7~0
Name
Name
POR
POR
R/W
R/W
LED Driver Operation
LED Driver Registers
Bit
Bit
SLEDC0 Register - BS85B12-3
SLEDC0 Register - BS85C20-3
The devices contain an LED driver function offering high current output drive capability which can be
used to drive external LEDs.
Depending upon which device is chosen various I/O pins have a capability of providing LED high
current drive outputs.
Whether a normal current sink capability or high current sink capability is used, the selection is made
using the SLEDCn registers.
R/W
D7
unimplemented, read as 0
D5~D0: PB5~PB0 I/O output sink current select
D7~D0: PB7~PB0 I/O output sink current select
BS85C20-3
7
7
0
BS85B12-3
0: Normal output sink current
1: 2 output sink current
0: Normal output sink current
1: 2 output sink current
Device
Touch Key Flash MCU with LCD/LED Driver
R/W
D6
6
6
0
PA0~PA7 (high source current)
PB0~PB5 (high sink current)
PA0~PA7 (high source current)
PB0~PB7 (high sink current)
PE0~PE5 (high source current)
LED Drive Pins
R/W
R/W
D5
D5
5
0
5
0
R/W
R/W
146
D4
D4
4
0
4
0
R/W
R/W
D3
D3
3
0
3
0
BS85B12-3/BS85C20-3
R/W
R/W
D2
D2
2
0
2
0
R/W
R/W
D1
D1
1
0
1
0
February 1, 2011
R/W
R/W
D0
D0
0
0
0
0