W78E58B Winbond, W78E58B Datasheet - Page 8

• Manufacturer Part Number: W78E58B
• Description: 8 BIT MICROCONTROLLER
• Manufacturer: Winbond

XICON - external interrupt control (C0H)
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
P4CONB (C3H)
PX3
External Interrupt 0
Timer/Counter 0
External Interrupt 1
Timer/Counter 1
Serial Port
Timer/Counter 2
External Interrupt 2
External Interrupt 3
BIT
7, 6
INTERRUPT
SOURCE
P43FUN1
P43FUN0
EX3
NAME
00: Mode 0. P4.3 is a general purpose I/O port which is the same as Port1.
01: Mode 1. P4.3 is a Read Strobe signal for chip select purpose. The address
10: Mode 2. P4.3 is a Write Strobe signal for chip select purpose. The address
11: Mode 3. P4.3 is a Read/Write Strobe signal for chip select purpose. The
IE3
ADDRESS
VECTOR
range depends on the SFR P43AH, P43AL, P43CMP1 and P43CMP0.
range depends on the SFR P43AH, P43AL, P43CMP1 and P43CMP0.
address range depends on the SFR P43AH, P43AL, P43CMP1, and
P43CMP0.
0BH
1BH
2BH
3BH
03H
13H
23H
33H
IT3
SEQUENCE WITHIN
PRIORITY LEVEL
PX2
0 (highest)
POLLING
7 (lowest)
- 8 -
1
2
3
4
5
6
FUNCTION
EX2
REQUIRED
SETTINGS
ENABLE
XICON.2
XICON.6
IE2
IE.0
IE.1
IE.2
IE.3
IE.4
IE.5
IT2
W78E58B
EDGE/LEVEL
INTERRUPT
XICON.0
XICON.3
TCON.0
TCON.2
TYPE
-
-
-
-