參數(shù)資料
型號: 16F872
廠商: Microchip Technology Inc.
英文描述: CAT 5E CROSSOVER PATCH CORD CABLE GREEN 10 FT
中文描述: 28引腳,8位閃存微控制器的CMOS
文件頁數(shù): 59/160頁
文件大?。?/td> 2600K
代理商: 16F872
1999 Microchip Technology Inc.
Preliminary
DS30221A-page 59
PIC16F872
9.1.2
SLAVE MODE
In Slave mode, the data is transmitted and received as
the external clock pulses appear on SCK. When the
last bit is latched, the interrupt flag bit SSPIF (PIR1<3>)
is set.
While in Slave mode, the external clock is supplied by
the external clock source on the SCK pin. This external
clock must meet the minimum high and low times as
specified in the electrical specifications.
While in SLEEP mode, the slave can transmit/receive
data. When a byte is received, the device will wake-up
from sleep.
FIGURE 9-3:
SPI MODE TIMING (SLAVE MODE WITH CKE = 0)
FIGURE 9-4:
SPI MODE TIMING (SLAVE MODE WITH CKE = 1)
Note:
When the SPI module is in Slave mode
with SS pin control enabled, (SSP-
CON<3:0> =
0100
) the SPI module will
reset if the SS pin is set to V
DD
.
If the SPI is used in Slave mode with
CKE = ’1’, then SS pin control must be
enabled.
Note:
SCK (CKP = 0)
SDI (SMP = 0)
SSPIF
bit7
bit6
bit5
bit4
bit3
bit2
bit1
bit0
SCK (CKP = 1)
SDO
bit7
bit0
SS (optional)
SCK (CKP = 0)
SDI (SMP = 0)
SSPIF
bit7
bit6
bit5
bit4
bit3
bit2
bit1
bit0
SCK (CKP = 1)
SDO
bit7
bit0
SS
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