UPD61052 NEC, UPD61052 Datasheet - Page 12

• Manufacturer Part Number: UPD61052
• Description: MPEG2 Audio / Video Encoder
• Manufacturer: NEC

1.8
1.8.1
1.8.2
(1) Serial bus interface
12
It chooses a parallel bus connection and a serial bus connection by the setting of CMODE2.
CMODE2
CA5 to CA0/
FA5 to FA0
CD7 to CD0/
FD7 to FD0
CWE/CSDI
CRE
CCS
CINT
CWAIT/FOE
CMODE0/CSCLK
CMODE1/CSDO
When connecting a serial bus, it downloads instruction of internal CPU from instruction ROM.
CMODE0/CSCLK
CWE/CSDI
CMODE1/CSDO
CCS
CINT
Host CPU Interface
Parallel bus interface
Serial bus interface
Name
Name
Name
IO
IO
IO
IO
O
O
O
O
I
I
I
I
I
I
I
I
I
I
158
187, 185 to 181
166, 164, 162
157
160
159
155
156
155
157
156
159
153
172, 170 to
153
161
Number
Number
Pin Number
Pin
Pin
Host CPU interface select
L: Parallel, H: Serial
SPI serial interface clock
Fix CSCLK to high level during CCS is disable (high level).
SPI serial interface data input
SPI serial interface data output
(Built-in 50 kΩ pull up resistor)
Chip selection
Interrupt
Data Sheet S15082EJ4V0DS
Address
Data
Write enable
Read enable
Chip selection
Interrupt
Wait
Setting of polarity of CWAIT
L: Low wait, H: High wait
Setting of operation of CWAIT
(Built-in 50 kΩ pull up resistor)
L: Wait operation.(after ready, pin continues ready)
H: Ready operation.(after ready, pin turns to wait)
Function
Function
Function
µ
PD61051, 61052
L
L
L
H
↑
L
H
Polarity
Polarity
Polarity
Active
Active
Active