W77E468 查看數據表（PDF） - Winbond
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W77E468 Datasheet PDF : 84 Pages
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Preliminary W77E468
TIMER 2 MSB
Bit:
7
6
5
4
3
2
1
0
TH2.7 TH2.6 TH2.5 TH2.4 TH2.3 TH2.2 TH2.1 TH2.0
Mnemonic: TH2
TH2: Timer 2 MSB
Address: CDh
PROGRAM STATUS WORD
Bit:
7
6
5
4
3
2
1
0
CY
AC
F0
RS1 RS0
OV
F1
P
Mnemonic: PSW
Address: D0h
CY: Carry flag: Set for an arithmetic operation which results in a carry being generated from the
ALU. It is also used as the accumulator for the bit operations.
AC: Auxiliary carry: Set when the previous operation resulted in a carry from the high order nibble.
F0: User flag 0: General purpose flag that can be set or cleared by the user.
RS.1-0: Register bank select bits:
RS1 RS0
0
0
0
1
1
0
1
1
Register bank
0
1
2
3
Address
00-07h
08-0Fh
10-17h
18-1Fh
OV: Overflow flag: Set when a carry was generated from the seventh bit but not from the 8th bit
as a result of the previous operation, or vice-versa.
F1: User Flag 1: General purpose flag that can be set or cleared by the user by software.
P:
Parity flag: Set/cleared by hardware to indicate odd/even number of 1's in the accumulator.
WATCHDOG CONTROL
Bit:
7
6
5
SMOD_1 POR
-
4
3
2
1
0
-
WDIF WTRF EWT RWT
Mnemonic: WDCON
Address: D8h
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