W78LE516 Datasheet, PDF (8/31 Pages) Winbond – 8-BIT MICROCONTROLLER

Preliminary W78LE516
XICON - external interrupt control (C0H)
PX3
EX3
IE3
IT3
PX2
EX2
IE2
IT2
PX3:External interrupt 3 priority high if set
EX3:External interrupt 3 enable if set
IE3:If IT3 = 1, IE3 is set/cleared automatically by hardware when interrupt is detected/serviced
IT3:External interrupt 3 is falling-edge/low-level triggered when this bit is set/cleared by software
PX2:External interrupt 2 priority high if set
EX2:External interrupt 2 enable if set
IE2:If IT2 = 1, IE2 is set/cleared automatically by hardware when interrupt is detected/serviced
IT2:External interrupt 2 is falling-edge/low-level triggered when this bit is set/cleared by software
Eight-source interrupt information:
INTERRUPT
SOURCE
VECTOR
ADDRESS
External Interrupt 0
03H
Timer/Counter 0
0BH
External Interrupt 1
13H
Timer/Counter 1
1BH
Serial Port
23H
Timer/Counter 2
2BH
External Interrupt 2
33H
External Interrupt 3
3BH
POLLING
ENABLE
SEQUENCE WITHIN REQUIRED
PRIORITY LEVEL SETTINGS
0 (highest)
IE.0
1
IE.1
2
IE.2
3
IE.3
4
IE.4
5
IE.5
6
XICON.2
7 (lowest)
XICON.6
INTERRUPT
TYPE
EDGE/LEVEL
TCON.0
-
TCON.2
-
-
-
XICON.0
XICON.3
P4CONB (C3H)
BIT
NAME
FUNCTION
7, 6 P43FUN1 00: Mode 0. P4.3 is a general purpose I/O port which is the same as Port1.
P43FUN0 01: Mode 1. P4.3 is a Read Strobe signal for chip select purpose. The address
range depends on the SFR P43AH, P43AL, P43CMP1 and P43CMP0.
10: Mode 2. P4.3 is a Write Strobe signal for chip select purpose. The address
range depends on the SFR P43AH, P43AL, P43CMP1 and P43CMP0.
11: Mode 3. P4.3 is a Read/Write Strobe signal for chip select purpose. The
address range depends on the SFR P43AH, P43AL, P43CMP1, and
P43CMP0.
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