Holtek BS83B24C Manual page 114

• SIMA Register
Bit 7
Name SIMA6
R/W R/W
POR 0
Bit 7~1 SIMA6~SIMA0: I
SIMA6~SIMA0 is the I
Bit 0 D0: Reserved bit, can be read or written
I C Control Registers
2
There are three control registers for the I
register is used to control the enable/disable function and to set the data transmission clock
frequency. The SIMC1 register contains the relevant flags which are used to indicate the I
communication status. Another register, SIMTOC, is used to control the I
described in the corresponding section.
• SIMC0 Register
Bit 7
Name SIM�
R/W R/W
POR 1
Bit 7~5 SIM2~SIM0: USIM SPI/I
000: SPI master mode; SPI clock is f
001: SPI master mode; SPI clock is f
010: SPI master mode; SPI clock is f
011: SPI master mode; SPI clock is f
100: SPI master mode; SPI clock is PTM CCRP match frequency/2
101: SPI slave mode
110: I
111: Unused mode
When the UMD bit is cleared to zero, these bits setup the SPI or I
of the USIM function. As well as selecting if the I
to control the SPI Master/Slave selection and the SPI Master clock frequency. The
SPI clock is a function of the system clock but can also be chosen to be sourced from
PTM and f
external Master device.
UMD: UART mode selection bit
Bit 4
0: SPI or I
1: UART mode
This bit is used to select the UART mode. When this bit is cleared to zero, the actual
SPI or I
must be set low for SPI or I
Bit 3~2 SIMDEB1~SIMDEB0: I
00: No debounce
01: 2 system clock debounce
1x: 4 system clock debounce
These bits are used to select the I
the I
"110".
Rev. 1.00
6 5
SIMA5 SIMA4 SIMA3
R/W R/W R/W
0 0
C slave address
2
C slave address bit 6~bit 0.
2
C interface, SIMC0, SIMC1 and SIMTOC. The SIMC0
2
6 5
SIM1 SIM0 UMD
R/W R/W R/W
1 1
C Operating Mode Control
2
C slave mode
2
. If the SPI Slave Mode is selected then the clock will be supplied by an
SUB
C mode
2
C mode can be selected using the SIM2~SIM0 bits. Note that the UMD bit
2
C mode.
2
C Debounce Time Selection
2
C debounce time when the USIM is configured as
2
C interface function by setting the UMD bit to "0" and the SIM2~SIM0 bits to
2
114
BS83B24C/BS83C40C
Touch Flash MCU
4 3 2
SIMA� SIMA1
R/W R/W
0 0 0
C time-out function and is
2
4 3 2
SIMDEB1 SIMDEB0 SIMEN
R/W R/W
0 0 0
/4
SYS
/16
SYS
/64
SYS
SUB
C or SPI function, they are used
2
1 0
SIMA0 D0
R/W R/W
0 0
C
2
1 0
SIMIC�
R/W R/W
0 0
C operating mode
2
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