UPD9993 datasheet(13/102 Pages) RENESAS

13 / 102 page

µ PD9993

Data Sheet S17306EJ2V0DS

(3) Host interface pins

(2/2)

Pin Name

Pin No.

I/O

Function

1. Parallel I/F mode (when PS = 0)

Host write input

This pin is set as active (low) while the host CPU writes to a host interface

Do not set this pin and the RD_B pin as active at the same time.

WR_B/ SCLK

Input

2. Serial I/F mode (when PS = 1)

Clock for serial I/F

1. Parallel I/F mode (when PS = 0)

Bit 0 for 8-bit host data bus

When the host CPU accesses the

µ PD9993, address and data I/O is

performed. When the CS_B signal is inactive (high), this pin is set to high

impedance.

D0/ SERINIT

I/O

2. Serial I/F mode (when PS = 1)

Initialization signal for serial I/F

D1 to D7

8J, 10H, 9H,

10G, 9G, 10F, 9F

I/O

1. Parallel I/F mode (when PS = 0)

Bits 7-0 for 8-bit host data bus

When the host CPU accesses the

µ PD9993, address and data I/O is

performed. When the CS_B signal is inactive (high), this bus is set to high

impedance.

2. Serial I/F mode (when PS = 1)

This bus is always set to high impedance. Connect these pins to GND.

INT_SG_B

10E

Output

Interrupt request from PCM sound generator

This signal requests interrupt from the

µ PD9993 to the host CPU.

This is used when requesting data transfer or internal status notification.

INT_DSP_B

output

Interrupt request from DSP (MP3/AAC decoder)

This signal request interrupt from the

µ PD9993 to the host CPU.

This is used when requesting data transfer or internal status notification.

Input

Parallel/serial I/F mode setting

1: Serial I/F mode

0: Parallel I/F mode

This pin has an internal pull-down resister (50 k

Ω)

(4) Exterior LED, Vibrator control output pins

Pin Name

Pin No.

I/O

Function

LED

10C

Output

External LED control output

This is the port output pin. Settings are entered by writing values to the port

setting register from the host CPU. Leave this pin open when not used.

VIB

Output

External vibrator control output

This is the port output pin. Settings are entered by writing values to the port

setting register from the host CPU. Leave this pin open when not used.

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