SIO1007 datasheet(83/108 Pages) MICROCHIP

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DS00002020A-page 83

SIO1007

18.4.56

CR39

CR39 can only be accessed in the configuration state and after the CSR has been initialized to 39H. CR39 is GPIO

Output Register and is used to select the output buffer of GP30-GP37pins.

18.4.57

CR3A

CR3A can only be accessed in the configuration state and after the CSR has been initialized to 3AH.

5GP15

6GP16

7GP17

TABLE 18-50: CR39

GPIO Output Register 3

Type: R/W

Default: 0XFF ON VTR POR

BIT NO.

BIT NAME

DESCRIPTION

GP30

The bits in this register are used to select the output buffer type of the

GP30-GP37 pins.

0=Push-pull

1=Open Drain

1GP31

2GP32

3GP33

4GP34

5GP35

6GP36

7GP37

TABLE 18-51: CR3A

Logical Device Activate Register

Type: R/W

Default: 0x00 on VCC POR

BIT NO.

BIT NAME

DESCRIPTION

SCE(FIR)

0 = Disables the host access to SCE (FIR) logical device (default).

1 = Enables the host access to SCE (FIR) logical device’s I/O runtime

SCE(FIR) Base Address Registers.

Runtime Register

0 = Disables the host access to Runtime Register logical device (default).

1 = Enables the host access to Runtime Register logical device’s I/O

by the Runtime Register Base Address Registers.

CIRCC2

0 = Disables the host access to CIRCC2 logical device (default).

1 = Enables the host access to CIRCC2 logical device’s I/O runtime

CIRCC2 Base Address Registers.

TABLE 18-49: CR38 (CONTINUED)

GPIO Pullup Register 1

Type: R/W

Default: 0XFF ON VTR POR

BIT NO.

BIT NAME

DESCRIPTION

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