UPD17708 datasheet(302/356 Pages) NEC

302 / 356 page

302

µPD17704, 17705, 17707, 17708, 17709

Table 20-2. Status of Each Pin in Halt and Clock Stop Status and Cautions (1/2)

Pin Function

Pin Symbol

Status of Each Pin and Cautions on Processing

Halt status

Clock stop status

General-

Port 0A

P0A3/SDA

purpose

P0A2/SCL

I/O port

P0A1/SCK0

P0A0/SO0

Port 0B

P0B3/SI0

P0B2/SCK1

P0B1/SO1

P0B0/SI1

Port 0C

P0C3-P0C0

Port 1D

P1D3

P1D2

P1D1/BEEP1

P1D0/BEEP0

Port 2A

P2A2

P2A1/FCG1

P2A0/FCG0

Port 2B

P2B3-P2B0

Port 2C

P2C3-P2C0

Port 2D

P2D2-P2D0

Port 3A

P3A3-P3A0

Port 3B

P3B3-P3B0

Port 3C

P3C30P3C0

Port 3D

P3D3-P3D0

General-

Port 0D

P0D3/AD3

purpose

input port

P0D0/AD0

Port 1A

P1A3/INT4

P1A2/INT3

P1A1

P1A0/TM0G

Port 1C

P1C3/AD5

P1C2/AD4

P1C1/AMIFC

P1C0/FMIFC

General-

Port 1B

P1B3

purpose

P1B2/PWM2

output port

P1B0/PWM0

Retains status before halt

(1) When specified as output pin

Current consumption increases if pin

is externally pulled down while it

outputs high level, or externally pulled

up while it outputs low level.

Exercise care in using N-ch open-

drain output (P0A3, P0A2, P1B3

through P1B0)

(2) When specified as input pin

Current consumption increases due

to noise if pin is floated

(3) Port 0D (P0D3/AD3 through P0D0/

AD0)

Current consumption increases if pin

is externally pulled up because it is

provided with pull-down resistor

selectable by software

(4) Port 1C (P1C3/AD5, P1C2/AD4,

P1C1/AMIFC, P1C0/FMIFC)

When P1C1/AMIFC or P1C0/FMIFC

pin is used for IF counter, current

consumption increases because

internal amplifier operates

All port pins are set in general-purpose

port mode (except P0D3/AD3 through

P0D0/AD0, P1A3/INT4, P1A2/INT3,

P1C3/AD5, and P1C2/AD4)

Input or output mode of general-purpose

I/O port set before clock stop status is

retained.

(1) When specified as general-purpose

output port

Current consumption increases due

to noise if pin is floated

(2) When specified as general-purpose

input port

Current consumption does not

increase due to noise even if pin is

floated

(3) P1A3/INT4, P1A2/INT3

Set as interrupt pin and current

consumption increases due to external

noise if pin is floated

(4) P0D3/AD3 through P0D0/AD0,

P1C3/AD5, P1C2/AD4

Pin used for A/D converter is retained

as is.

Pull-down resistor of P0D3 through

P0D0 pin retains previous status

Specified as general-purpose output port.

Output contents are retained as is. If pin

is externally pulled down while it outputs

high level or externally pulled up while it

outputs low level, current consumption

increases

UPD17708 Datasheet(PDF) 302 Page - NEC

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