W79E201 Datasheet, PDF (22/87 Pages) Winbond – 8-BIT MICROCONTROLLER

W79E201
BIT NAME
FUNCTION
7
-
Reserved.
High Priority Interrupt Status. When set, it indicates that software is servicing a
6
HIP high priority interrupt. This bit will be cleared when the program executes the
corresponding RETI instruction.
Low Priority Interrupt Status. When set, it indicates that software is servicing a
5
LIP low priority interrupt. This bit will be cleared when the program executes the
corresponding RETI instruction.
4
-
Reserved.
3
-
Reserved.
2
-
Reserved.
1
SPTA0
Serial Port 0 Transmit Activity. This bit is set during serial port is currently
transmitting data. It is cleared when TI bit is set by hardware.
0
SPRA0
Serial Port 0 Receive Activity. This bit is set during serial port is currently
receiving a data. It is cleared when RI bit is set by hardware.
Timed Access
Bit:
7
TA.7
Mnemonic: TA
6
TA.6
5
TA.5
4
TA.4
3
TA.3
2
TA.2
1
TA.1
Address: C7h
0
TA.0
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.
Timer 2 Control
Bit:
7
6
TF2 EXF2
Mnemonic: T2CON
5
RCLK
4
TCLK
3
2
EXEN2 TR2
1
C/ T2
Address: C8h
0
CP/RL2
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