VR4102 datasheet(689/701 Pages) NEC

689 / 701 page

APPENDIX A DIFFERENCES BETWEEN VR4102 AND VR4101

689

A.2.8 GIU

(1) GPIO Pins

The VR4102 has 49 general-purpose I/O pins and 33 of them have alternate functions, while the VR4101 has 12

general I/O pins and none of them have alternate functions.

GPIO[15] pin of the VR4102 is assigned as DCD# input which has dedicated pin in the VR4101. In both the

VR4102 and the VR4101, GIU controls DCD# input as well as GPIO pins.

GPIO pins are also used as interrupt request inputs except for GPIO[49..32] of the VR4102, and in which power

modes an interrupt request is enabled is different from each GPIO pin.

The functions of GPIO pins are as summarized below.

Enabled power mode

Pins

I/O

Interrupt input

VR4102

VR4101

Alternative

functions in

VR4102

Notes

GPIO[49]

N/A

Standby

GPIO[48]

I/O

N/A

Standby

DBUS32

GPIO[47..44]

I/O

N/A

Standby

DSIU pins

GPIO[43..32]

N/A

Standby

KSCAN[11..0]

GPIO[31..16]

I/O

Standby

DATA[31..16]

GPIO[15]

Hibernate

DCD#

GPIO[14]

I/O

Suspend

GPIO[13]

I/O

Suspend

Hibernate

GPIO[12]

I/O

Suspend

GPIO[11]

I/O

Suspend

Standby

GPIO[10..9]

I/O

Suspend

GPIO[8..4]

I/O

Standby

GPIO[3..0]

I/O

Hibernate

Standby

Notes 1. This pin is assigned as DCD# input in the VR4102.

2. This pin does not exist in the VR4101. DCD input is internally connected to the corresponding

(2) Interrupt Input Control

In both the VR4102 and the VR4101, either edge, high level, or low level of the input signal is selectable as an

interrupt input trigger.

In the VR4102, whether interrupt requests are held in GIU or not is selectable, while they are not held in the

VR4101.

VR4102 Datasheet(PDF) 689 Page - NEC

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