参数资料
型号: MC68HC11C0MFN2
厂商: MOTOROLA INC
元件分类: 微控制器/微处理器
英文描述: 8-BIT, 2 MHz, MICROCONTROLLER, PQCC68
封装: PLASTIC, LCC-68
文件页数: 66/76页
文件大小: 394K
代理商: MC68HC11C0MFN2
MC68HC11C0
MOTOROLA
MC68HC11C0TS/D
69
Bit 5 — Not implemented
Always reads zero
MSTR — Master Mode Select
0 = Slave mode
1 = Master mode
CPOL, CPHA — Clock Polarity, Clock Phase
Refer to Figure 15.
Figure 15 SPI Transfer Format
SPR[1:0] — SPI Clock Rate Selects
Table 16 SPI Clock Rate Selects
SPR[1:0]
Divide
E Clock By
SPI Baud Rate at
E = 1 MHz
SPI Baud Rate at
E = 2 MHz
SPI Baud Rate at
E = 3 MHz
0 0
2
500 kHz
1.0 MHz
1.5 MHz
0 1
4
250 kHz
500 kHz
750 kHz
1 0
16
125 kHz
375 kHz
1 1
32
62.5 kHz
187.5 kHz
SPI TRANSFER FORMAT 1
2345678
1
SCK (CPOL = 1)
SCK (CPOL = 0)
SCK CYCLE #
SS (TO SLAVE)
654321
LSB
MSB
654321
LSB
1
2
3
5
4
SLAVE CPHA=1 TRANSFER IN PROGRESS
MASTER TRANSFER IN PROGRESS
SLAVE CPHA=0 TRANSFER IN PROGRESS
1. SS ASSERTED
2. MASTER WRITES TO SPDR
3. FIRST SCK EDGE
4. SPIF SET
5. SS NEGATED
SAMPLE INPUT
DATA OUT
(CPHA = 0)
SAMPLE INPUT
DATA OUT
(CPHA = 1)
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