BS85B12-3 HOLTEK [Holtek Semiconductor Inc], BS85B12-3 Datasheet - Page 124

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

Rev. 1.00
SIMC0
SIMC1
SIMD
SIMA
I2CTOC
Register
Name
I
2
C Registers
I2CTOEN
The debounce time, if selected, can be chosen to be either 1 or 2 system clocks.
There are four control registers associated with the I
one data register, SIMD. The SIMD register, which is shown in the above SPI section, is used to store
the data being transmitted and received on the I
bus, the actual data to be transmitted must be placed in the SIMD register. After the data is received
from the I
reception of data from the I
with other I/O pins and must be selected using the SIMEN bit in the SIMC0 register.
Note that the SIMA register also has the name SIMC2 which is used by the SPI function. Bit SIMEN and
bits SIM2~SIM0 in register SIMC0 are used by the I
IICA6
SIM2
HCF
D7
7
2
C bus, the microcontroller can read it from the SIMD register. Any transmission or
I2CTOF
Touch Key Flash MCU with LCD/LED Driver
HAAS
IICA5
SIM1
D6
6
I2CTOS5
IICA4
SIM0
HBB
2
D5
C bus must be made via the SIMD register. The SIM pins are pin shared
5
I
2
C Register List
I2CTOS4
PCKEN
IICA3
HTX
118
D4
4
2
C bus. Before the microcontroller writes data to the I
Bit
I2CTOS3
PCKP1
2
2
TXAK
IICA2
C bus, SIMC0, SIMC1, SIMA and I2CTOC and
C interface.
D3
3
BS85B12-3/BS85C20-3
I2CTOS2
PCKP0
IICA1
SRW
D2
2
I2CTOS1
IAMWU
SIMEN
IICA0
D1
1
February 1, 2011
I2CTOS0
RXAK
D0
D0
0
2
C