PIC16C717/770/771
9.1.7
SLEEP OPERATION
9.1.8
EFFECTS OF A RESET
In master mode, all module clocks are halted and the
transmission/reception will remain in that state until the
device wakes from sleep. After the device returns to
normal mode, the module will continue to transmit/
receive data.
In slave mode, the SPI transmit/receive shift register
operates asynchronously to the device. This allows the
device to be placed in sleep mode and data to be
shifted into the SPI transmit/receive shift register.
When all 8 bits have been received, the MSSP interrupt
flag bit will be set and if enabled will wake the device
from sleep.
A reset disables the MSSP module and terminates the
current transfer.
TABLE 9-1:
Address
0Bh, 8Bh,
10Bh,18Bh
0Ch
8Ch
13h
14h
94h
REGISTERS ASSOCIATED WITH SPI OPERATION
Name
INTCON
PIR1
PIE1
SSPBUF
SSPCON
SSPSTAT
WCOL
SMP
Bit 7
GIE
鈥?/div>
鈥?/div>
Bit 6
PEIE
ADIF
ADIE
Bit 5
T0IE
鈥?/div>
鈥?/div>
Bit 4
INTE
鈥?/div>
鈥?/div>
Bit 3
RBIE
SSPIF
SSPIE
Bit 2
T0IF
CCP1IF
CCP1IE
Bit 1
INTF
TMR2IF
TMR2IE
Bit 0
RBIF
TMR1IF
TMR1IE
POR, BOR
0000 000x
-0-- 0000
-0-- 0000
xxxx xxxx
SSPM0
BF
0000 0000
0000 0000
MCLR, WDT
0000 000u
-0-- 0000
-0-- 0000
uuuu uuuu
0000 0000
0000 0000
Synchronous Serial Port Receive Buffer/Transmit Register
SSPOV
CKE
SSPEN
D/A
CKP
P
SSPM3
S
SSPM2
R/W
SSPM1
UA
Legend:
x
= unknown,
u
= unchanged,
-
= unimplemented read as 鈥?鈥? Shaded cells are not used by the MSSP in SPI mode.
DS41120A-page 76
Advanced Information
漏
1999 Microchip Technology Inc.
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