DAEWOO ELECTRONICS DSL-19M1WCD, Service Manual, Page: 36 / 81

35
87 IOA21
Input
2~16MA, SR
SMT
1) Flash address 21 / IO
2) While External FLASH size <= 2MB:
I) GPIO
88 ALE
Input
2~16MA, SR
PU, SMT
Microcontroller address latch enable
Pin Main Alt. Type Description
78 IOOE#
Input
2~16MA, SR
SMT
Flash output enable, active low / IO
66 IOWR#
Input
2~16MA, SR
SMT
Flash write enable, active low / IO
76 IOCS#
Input
2~16MA, SR
PU, SMT
Flash chip select, active low / IO
94 UWR#
Input
2~16MA, SR
PU, SMT
Microcontroller write strobe, active low
95 URD#
Input
2~16MA, SR
PU, SMT
Microcontroller read strobe, active low
97 UP1_2
Input
4MA, SR
PU, SMT Microcontroller port 1-2
98 UP1_3
Input
4MA, SR
PU, SMT Microcontroller port 1-3
99 UP1_4
Input
4MA, SR
PU, SMT Microcontroller port 1-4
100 UP1_5
Input
4MA, SR
PU, SMT Microcontroller port 1-5
101 UP1_6 SCL
Input
4MA, SR
PU, SMT
1) Microcontroller port 1-6
2) I
2
C clock pin
102 UP1_7 SDA
Input
4MA, SR
PU, SMT
1) Microcontroller port 1-7
2) I
2
C data pin