W78c58, W78c58 sfrs address location map, Power-off flag – Rainbow Electronics W78C58 User Manual
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W78C58
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W78C58 SFRs address location map:
F8
FF
F0
+ B
F7
E8
EF
E0
+ ACC
E7
D8
+P4
DF
D0
+ PSW
D7
C8
+T2CON
RCAP2L
RCAP2H
TL2
TH2
CF
C0
+XICON
C7
B8
+ IP
BF
B0
+ P3
B7
A8
+ IE
AF
A0
+ P2
A7
98
+ SCON
SBUF
9F
90
+ P1
97
88
+ TCON
TMOD
TL0
TL1
TH0
TH1
AUXR
8F
80
+P0
SP
DPL
DPH
PCON
87
Notes:
1. + SFR is bit-addressable.
2. is additional defined function.
Power-off Flag
***PCON - Power Control (87H)
SMOD
SMOD0
-
POF
GF1
GF0
PD
IDL
SMOD:
Double baud rate bit. When set to a 1, the baud rate is doubled when the serial port is
being used in either modes 1, 2, 3.
SMOD0:
Enable FE bit in SCON. This bit is an alternative switch of SM0 and FE (Frame Error)
bit.
When set to a 1, SCON.7 means a FE bit, otherwise a SM0 bit.
POF:
Power off flag. Bit is set by hardware when power on reset. It can be cleared by software
to determine chip reset is a warm boot or cold boot.
GF1, GF0: These two bits are general-purpose flag bits for the user.
PD:
Power down mode bit. Set it to enter power down mode.
IDL:
Idle mode bit. Set it to enter idle mode.
The power-off flag is located at PCON.4. This bit is set when V
DD
has been applied to the part. It can
be used to determine if a reset is a warm boot or a cold boot if it is subsequently reset by software.