Holtek BS83B08-3 Manual page 91

BS83B08-3/B12-3/B16-3/B16G-3/C24-3
8-Bit Touch Key Flash MCU
I2CTOC Register
Bit 7
Name I2CTOEN
R/W R/W
POR 0
Bit 7 I2CTOEN: I
0: disable
1: enable
Bit 6 I2CTOF: Time-out flag
0: no time-out
1: time-out occurred
Bit 5~0 I2CTOS5~I2CTOS0: Time-Out Time Definition
2
I C time-out clock source is f
2
I C Time-Out time is given by: [I2CTOS5 : I2CTOS0]+1) x (32/f
The SIMD register is used to store the data being transmitted and received. The same register is used
by both the SPI and I
transmitted must be placed in the SIMD register. After the data is received from the I
vice can read it from the SIMD register. Any transmission or reception of data from the I
be made via the SIMD register.
SIMD Register
Bit 7
Name D7
R/W R/W
POR x
SIMA Register
Bit 7
Name IICA6
R/W R/W
POR x
Bit 7~1 IICA6~ IICA0: I
IICA6~ IICA0 is the I
The SIMA register is also used by the SPI interface but has the name SIMC2. The SIMA
register is the location where the 7-bit slave address of the slave device is stored. Bits 7~1 of the
SIMA register define the device slave address. Bit 0 is not defined.
When a master device, which is connected to the I
matches the slave address in the SIMA register, the slave device will be selected. Note that the
SIMA register is the same register address as SIMC2 which is used by the SPI interface.
Bit 0 Undefined bit
This bit can be read or written by user software program.
Rev. 1.50
6 5
I2CTOF I2CTOS5 I2CTOS4
R/W R/W R/W
0 0
2
C Time-out Control
/32.
LIRC
2
C functions. Before the device writes data to the I
6 5
D6 D5
R/W R/W R/W
x x
6 5
IICA5 IICA4 IICA3
R/W R/W R/W
x x
2
C slave address
2
C slave address bit 6~bit 0.
4 3 2
I2CTOS3 I2CTOS2
R/W R/W
0 0 0
)
LIRC
4 3 2
D4 D3 D2
R/W R/W
x x x
4 3 2
IICA2 IICA1
R/W R/W
x x x
2
C bus, sends out an address, which
91
1 0
I2CTOS1 I2CTOS0
R/W R/W
0 0
2
C bus, the actual data to be
2
C bus, the de-
2
C bus must
1 0
D1 D0
R/W R/W
x x
²x² unknown
1 0
IICA0 D0
R/W R/W
x x
²x² unknown
April 28, 2020