HD64F2633RF28 datasheet(86/1453 Pages) RENESAS

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Type

Symbol

I/O

Name and Function

Operating mode

control

MD2 to MD0

Input

Mode pins: These pins set the operating mode.

The relation between the settings of pins MD2 to MD0

and the operating mode is shown below. These pins

should not be changed while the H8S/2633 Series is

operating.

MD2

MD1

MD0

Operating Mode

000—

1—

10—

1—

Mode 4

Mode 5

Mode 6

Mode 7

System control

RES

Input

Reset input: When this pin is driven low, the chip is

reset.

MRES

Input

Manual reset: When this pin is driven low, a

transmission is made to manual reset mode.

STBY

Input

Standby: When this pin is driven low, a transition is

made to hardware standby mode.

BREQ

Input

Bus request: Used by an external bus master to issue

a bus request to the H8S/2633 Series.

BREQO

Output

Bus request output: The external bus request signal

used when an internal bus master accesses external

space in the external bus-released state.

BACK

Output

Bus request acknowledge: Indicates that the bus has

been released to an external bus master.

FWE

Input

Flash write enable: Pin for flash memory use (in

planning stage).

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