M32CSLASH86 datasheet(397/505 Pages) RENESAS

397 / 505 page

Page 374

24. Programmable I/O Ports

)

(

Figure 24.8 PS2 Register and PS3 Register

Function

Function Select Register A2

Bit Name

Bit

Symbol

Address

After Reset

PS2

03B416

00X0 00002

PS2_0

PS2_1

Port P80 Output

Function Select Bit

0 : I/O port

1 : Selected by the PSL2_0 bit

Nothing is assigned. When write, set to "0".

When read, its content is indeterminate.

Port P81 Output

Function Select Bit

PS2_2

(b4 - b3)

(b5)

(b7 - b6)

Port P82 Output

Function Select Bit

Reserved Bit

Set to "0"

Reserved Bit

Set to "0"

0 : I/O port

1 : Selected by the PSL2_1 bit

0 : I/O port

1 : Selected by the PSL2_2 bit

Function

Function Select Register A3(1)

Bit Name

Bit

Symbol

Address

After Reset

PS3

03B516

0016

PS3_0

PS3_1

Port P90 Output

Function Select Bit

PS3_3

PS3_4

PS3_5

PS3_7

0 : I/O port

1 : CLK3 output

0 : I/O port

1 : RTS3

0 : I/O port

1 : CLK4 output

Port P91 Output

Function Select Bit

Port P93 Output

Function Select Bit

Port P94 Output

Function Select Bit

Port P95 Output

Function Select Bit

Port P97 Output

Function Select Bit

PS3_6

0 : I/O port

1 : Selected by the PSC3_6 bit

Port P96 Output

Function Select Bit

PS3_2

Port P92 Output

Function Select Bit

0 : I/O port

1 : RTS4

0 : I/O port

1 : Selected by the PSL3_1 bit

0 : I/O port

1 : Selected by the PSL3_2 bit

0 : I/O port

1 : Selected by the PSL3_7 bit

NOTES:

1. Set the PS3 register immediately after the PRC2 bit in the PRCR register is set to "1" (write enable). Do

not generate an interrupt or a DMA transfer between the instruction to set the PRC2 bit to "1" and the

instruction to set the PS3 register.

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