UPD61052 NEC, UPD61052 Datasheet - Page 57

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

4.4
reading once is 128 bytes. When reading is equal to or more than 128 byte data, execute reading processing
repeatedly. The number of the transfer bytes is a 4 bytes unit.
While encoding, the host CPU reads parameters of usable work area of SDRAM. The maximum data of the
SDRAM Read during Executing
N
N
SDRAM → host CPU transfer
which requests data transfer
which requests data transfer
Number of transfer bytes
Transfer counter register
Transfer error handling
Source address register
Interrupt mask register
Interrupt mask register
Transfer mode register
(2CH to 2FH) setting
(30H): (02H or 01H)
Clear mask Interrupt
(21H to 23H) setting
(27H to 29H) setting
(20H) ← 01H setting
Interrupt register 0
(2CH to 2FH) settin
Interrupt register 0
SDRAM reading,
during executing
Mask Interrupt
(refer to 4.8)
(30H): 04H
Return
CINT?
Y
Y
N
Data Sheet S15082EJ4V0DS
Y
Transfer ending (refer to 4.7)
which requests data transfer
Interrupt register 0 (30H)←
Interrupt register 0 (30H)
Interrupt register 0 clear
Interrupt mask register
Transfer data register
(2CH to 2FH) setting
Clear mask Interrupt
(3FH)→Read data
reading ending?
All instructions
Return
Y
N
µ
PD61051, 61052
57