H8SLASH3028 datasheet(92/923 Pages) RENESAS

92 / 923 page

Rev. 2.00, 09/03, page 62 of 890

3.5

Pin Functions in Each Operating Mode

The pin functions of ports 1 to 5 and port A vary depending on the operating mode. Table 3.3

indicates their functions in each operating mode.

Table 3.3 Pin Functions in Each Mode

Port

Mode 1

Mode 2

Mode 3

Mode 4

Mode 5

Mode 6

Mode 7

Port 1

A7 to A0

P17 to P10*

P17 to P10

Port 2

A15 to A8

P27 to P20*

P27 to P20

Port 3

D15 to D8

P37 to P30

Port 4

P47 to P40*

D7 to D0*

P47 to P40*

D7 to D0*

P47 to P40*

P47 to P40

Port 5

A19 to A16

P53 to P50*

P53 to P50

Port A

PA7 to PA4

PA6 to PA4,

A20*

PA6 to PA4,

A20*

PA7 to PA4*

PA7 to PA4

Notes: 1. Initial state. The bus mode can be switched by settings in ABWCR. These pins function

as P47 to P40 in 8-bit bus mode, and as D7 to D0 in 16-bit bus mode.

2. Initial state. These pins become address output pins when the corresponding bits in the

data direction registers (P1DDR, P2DDR, P5DDR) are set to 1.

3. Initial state. A20 is always an address output pin. PA6 to PA4 are switched over to A23 to

A21 output by writing 0 in bits 7 to 5 of BRCR.

4. Initial state. PA7 to PA4 are switched over to A23 to A20 output by writing 0 in bits 7 to 4

of BRCR.

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