Spi Clock Prescaler Register - Spicpr - Holtek HT32F52243 User Manual

32-Bit Arm ® Cortex ® -M0+ MCU
HT32F52243/HT32F52253
SPI Clock Prescaler Register – SPICPR
This register specifies the SPI clock prescaler ratio.
Offset: 0x00C
Reset value: 0x0000_0000
31
Type/Reset
23
Type/Reset
15
Type/Reset RW 0 RW
7
Type/Reset RW 0 RW
Bits Field
[15:0] CP
Rev. 1.20
30 29 28
22 21 20
14 13 12
0 RW 0 RW
6 5 4
0 RW 0 RW
Descriptions
SPI Clock Prescaler
The SPI clock (SCK) is determined by the following equation:
f = f / (2 × (CP + 1)), where the CP ranges is from 0 to 65535
SCK PCLK
Note: For the SPI slave mode, the system clock (f
than the external SPI SCK input.
433 of 501
27 26
Reserved
19 18
Reserved
11 10
CP
0 RW 0 RW 0 RW
3 2
CP
0 RW 0 RW 0 RW
) must be at least 3 times faster
PCLK
25 24
17 16
9 8
0 RW 0
1 0
0 RW 0
September 19, 2018