32186 datasheet(815/1032 Pages) RENESAS

815 / 1032 page

EXTERNAL BUS INTERFACE

17-5

32185/32186 Group Hardware Manual

Rev.1.10 REJ09B0235-0110 May 15, 07

17.2 External Bus Interface Related Registers

The following describes the external bus interface related registers.

17.2.1 Port Operation Mode and Port Peripheral Function Select Registers

Ports P0–P4 (except P41–P43), P124, P125, P224 and P225 are switched for external access signal pins

during external extension mode when so set by the corresponding Operation Mode Register. During processor

mode, these ports always function as external access signal pins.

During external extension mode, these pins are switched for port upon exiting reset. Therefore, by switching the

pin functions for only those pins that are needed for external access, the remaining pins can be used as port.

Ports P70–P73, P126, P127, P150, P153, P220 and P221 can be switched for external access signal pins at

any time irrespective of the CPU operation mode. Ports P41–P43 always function as external access signal

pins during external extension and processor modes.

P0 Operation Mode Register (P0MOD)

<Address: H’0080 0740>

Bit Name

Function

P00MD

0: P00/DD0 (Note 1)

Port P00 operation mode bit

1: DB0/TO21 (Note 2)

P01MD

0: P01/DD1 (Note 1)

Port P01 operation mode bit

1: DB1/TO22 (Note 2)

P02MD

0: P02/DD2 (Note 1)

Port P02 operation mode bit

1: DB2/TO23 (Note 2)

P03MD

0: P03/DD3 (Note 1)

Port P03 operation mode bit

1: DB3/TO24 (Note 2)

P04MD

0: P04/DD4 (Note 1)

Port P04 operation mode bit

1: DB4/TO25 (Note 2)

P05MD

0: P05/DD5 (Note 1)

Port P05 operation mode bit

1: DB5/TO26 (Note 2)

P06MD

0: P06/DD6 (Note 1)

Port P06 operation mode bit

1: DB6/TO27 (Note 2)

P07MD

0: P07/DD7 (Note 1)

Port P07 operation mode bit

1: DB7/TO28 (Note 2)

Note 1: The port and DD input functions both are effective. To use the port as DD input pin, set the port direction for input.

Note 2: Which function of the pin is used depends on how the P0 Peripheral Function Select Register is set.

Note: • During processor mode, settings of this register have no effect, and the ports function as external bus interface signal

pins (DB0-DB7).

17.2 External Bus Interface Related Registers

3456

P00MD

P01MD

P02MD

P03MD

P04MD

P05MD

P06MD

P07MD

000

0000

32186 Datasheet(PDF) 815 Page - Renesas Technology Corp

32186 Datasheet(HTML) 815 Page - Renesas Technology Corp

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 ...More

Datasheet Download

Link URL