21 p3 configuration, 22 p4 configuration – Cypress enCoRe CY7C602xx User Manual
Page 43
CY7C601xx, CY7C602xx
Document 38-16016 Rev. *E
Page 43 of 68
16.2.21 P3 Configuration
16.2.22 P4 Configuration
Table 16-18. P3 Configuration (P3CR) [0x16] [R/W]
Bit #
7
6
5
4
3
2
1
0
Field
Reserved
Int Enable
Int Act Low
TTL Thresh
High Sink
Open Drain
Pull Up Enable
Output Enable
Read/Write
–
R/W
R/W
R/W
R/W
R/W
R/W
R/W
Default
0
0
0
0
0
0
0
0
In CY7C602xx, this register controls the operation of pins P3.0–P3.1. In CY7C601xx, this register controls the operation of pins
P3.0–P3.7.
The 50 mA sink drive capability is only available on pin P3.7 and only on CY7C601xx. In CY7C602xx, only 8 mA sink drive
capability is available on this pin regardless of the setting of the High Sink bit.
Table 16-19. P4 Configuration (P4CR) [0x17] [R/W]
Bit #
7
6
5
4
3
2
1
0
Field
Reserved
Int Enable
Int Act Low
TTL Thresh
High Sink
Open Drain
Pull Up Enable
Output Enable
Read/Write
–
R/W
R/W
R/W
R/W
R/W
R/W
R/W
Default
0
0
0
0
0
0
0
0
This register exists only in CY7C601xx. This register controls the operation of pins P4.0–P4.3.