16.2.21 P3 Configuration

CY7C601xx, CY7C602xx

16.2.21 P3 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.

16.2.22 P4 Configuration

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.

Document 38-16016 Rev. *E

Page 43 of 68

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Cypress CY7C602xx, CY7C601xx manual 16.2.21 P3 Configuration, 18. P3 Configuration P3CR 0x16 R/W, 16.2.22 P4 Configuration