w79e532 Winbond Electronics Corp America, w79e532 Datasheet - Page 21

• Manufacturer Part Number: w79e532
• Description: 8-bit Microcontroller
• Manufacturer: Winbond Electronics Corp America

Slave Address Mask Enable
SADEN: This register enables the Automatic Address Recognition feature of the Serial port 0. When
Power Management Register
ALE0FF: This bit disables the expression of the ALE signal on the device pin during all on-board
DME0: This bit determines the on-chip MOVX SRAM to be enabled or disabled. Set this bit to 1 will
Status Register
HIP: High Priority Interrupt Status. When set, it indicates that software is servicing a high priority
LIP: Low Priority Interrupt Status. When set, it indicates that software is servicing a low priority
Timed Access
TA: The Timed Access register controls the access to protected bits. To access protected bits, the
user must first write AAH to the TA. This must be immediately followed by a write of 55H to TA.
Now a window is opened in the protected bits for three machine cycles, during which the user can
write to these bits.
interrupt. This bit will be cleared when the program executes the corresponding RETI
instruction.
interrupt. This bit will be cleared when the program executes the corresponding RETI
instruction.
0 = ALE expression is enable; 1 = ALE expression is disable
a bit in the SADEN is set to 1, the same bit location in SADDR will be compared with the
incoming serial data. When SADEN.n is 0, then the bit becomes a "don't care" in the
comparison. This register enables the Automatic Address Recognition feature of the Serial
port 0. When all the bits of SADEN are 0, interrupt will occur for any incoming address.
program and data memory accesses. External memory accesses will automatically enable
ALE independent of ALEOFF.
enable the on-chip 1KB MOVX SRAM.
Bit:
Mnemonic: SADEN
Mnemonic: PMR
Mnemonic: STATUS
Mnemonic: TA
Bit:
Bit:
Bit:
7
-
7
-
TA.7
7
7
6
-
HIP
6
TA.6
6
6
5
-
LIP
5
TA.5
5
5
- 21 -
4
-
4
-
TA.4
4
4
Publication Release Date: November 21, 2005
3
-
3
TA.3
-
W79E532/W79L532
3
3
ALE-OFF
Address: B9h
Address: C4h
Address: C5h
Address: C7h
2
TA.2
2
-
2
2
TA.1
1
-
1
-
1
1
Revision A5
DME0
TfA.0
0
0
-
0
0