BS85B12-3 HOLTEK [Holtek Semiconductor Inc], BS85B12-3 Datasheet - Page 118

• 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
SIMD
SIMC2
Register
Name
Name
POR
R/W
Bit
SPI Registers
SIMD Register
There are three internal registers which control the overall operation of the SPI interface. These are the
SIMD data register and two registers SIMC0 and SIMC2. Note that the SIMC1 register is only used by
the I
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 SPI bus, the de-
vice can read it from the SIMD register. Any transmission or reception of data from the SPI bus must
be made via the SIMD register.
SIM2
R/W
D7
D7
D7
7
7
x
2
C interface.
Touch Key Flash MCU with LCD/LED Driver
SIM1
R/W
D6
D6
D6
6
6
x
2
C functions. Before the device writes data to the SPI bus, the actual data to be
CKPOLB
SIM0
R/W
D5
D5
5
5
x
SPI Block Diagram
SPI Register List
PCKEN
CKEG
R/W
112
D4
D4
4
4
x
Bit
PCKP1
MLS
R/W
D3
D3
3
3
x
BS85B12-3/BS85C20-3
PCKP0
CSEN
R/W
D2
D2
2
2
x
SIMEN
WCOL
R/W
D1
D1
1
1
x
February 1, 2011
x unknown
TRF
R/W
D0
D0
0
0
x