DV-NC55 (serv.man11). Function list - Sharp DVD Service Manual (repair manual). Page 9

Name

Type

Description

Host interface, CD-DSP interface, sub-code interface (32-pin)

RESET#

ID

Reset input (active Low). When shifting from the assert state to deassert state,
initialization process of this device is started.
Stand-by input (active Low). When asserting with RESET#, all of output pins and

STANDBY#

ID

bidirectional pins enter the float state, and this device is electrically separated from
periphery. All internal operations are stopped and the power consumption is minimized.
In the stand-by mode, the contents of SDRAM and setup parameter are not retained.

IDLE

O(p.u.)

Idle, Init, or Reset state display output (active High). It enters the active state after
resetting.
Data bus width of the host interface is determined. It can be changed during resetting

HWID

ID

only. The host interface of the device is set to 8 bits at the low level (GNDP) and 16
bits at the high level (VDDP).
When the width is 16 bits (HWID is VDDP), byte order of the host interface data bus

HORD

ID

is determined. It can be changed during resetting only. The device is set to input/
output m.s. byte HD at [15:8] at the low level (GNDP), and m.s. byte at [7:0] at the
high level. When HWID is at the GNDP level, it is connected to GNDP.

HTYPE

ID

Protocol of the host bus is determined. It can be changed during resetting only. The
device is set  to A type at the low level (GNDP) and B type at the high level (VDDP).

HD[7:0]

I/O

8 I.s. of the host data bus. When HWID input is connected to GNDP, only this signal

(HD[7:4])

(r.t.)

is defined  as the host data signal. When HWID is connected to VDDP, it is used as

(HD[3])

(p.u.)

an 8 I.s. line of 16-bit data bus.

(HD[2:1])

(r.t.)

(HD[0])

(p.u.)

HD[11:8]

I/O

When HWID is connected to VDDP, it is used as a data line 11:8 of the 16-bit host

(HD[11])

(p.d.)

data bus.

(HD[10:8])

(r.t.)

When HWID is connected to VDDP, it is used as a data line 15:12 of the 16-bit host

HD[15:12]

I/O(r.t.)

data bus.  When HWID is connected to GNDP, it is used as a the CD-DSP serial input

port pin as defined below.

CDCLK (HD[12])

I

CD-DSP bit clock input

CDDAT (HD[13])

I

CD-DSP data input

CDFRM (HD[14)

I

CD-DSP LR clock (frame) input

CDERR (HD[15])

I

CD-DSP data error input

HA[3:0]

I

Host address input. The address signal specifying the physical address in this device
 is input.

HCS#

I

Host chip select input. Active Low.
Host protocol A type (HTYPE=GNDP): HR/W#. This input determines the direction of

HWR# (HR/W#)

I

the host access.
Host protocol B type (HTYPE=VDDP): HWR#. Host write input (active Low).

HRD# (HDS)

I

Host protocol A type (HTYPE=GNDP): HDS#. Data strobe input (active Low).
Host protocol B type (HTYPE=VDDP): HRD#. Host read input (active Low).

Glossary

I

Input

O

Output

I/O

Bidirectional

AI

Analog input

AO

Analog output

AI/O

Analog bidirectional

ID

Input not synchronized

p.u.

Terminal internally

p.d.

Terminal internally

with PCLK

pulled up

pulled down

r.t.

Retained terminal