UPD61052 NEC, UPD61052 Datasheet - Page 55

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

4.2.4
stores more than one piece of firmware beforehand and it can be replaced according to need, too.
canceled on the way, the internal CPU sometime malfunction. When transferring data below the 1k-byte, transfer,
dividing every 128 bytes. The number of the transfer bytes is a 4-byte unit.
The firmware for the internal CPU can be stored in the firmware cabinet of SDRAM from the external ROM. It
When transferring data continuously, transfer during resetting an internal CPU, If reset of internal CPU is can
External ROM to SDRAM
(a) Transfer over 1 Kbytes
Internal CPU reset is canceled
Clear mask transfer interrupt
Destination address register
Number of transfer bytes /4
Transfer counter register
Source address register
iROM→SDRAM transfer
Transfer mode register
Interrupt mask0 (2BH)
Interrupt mask0 (2BH)
Reset register (3EH)
(20H) ← 10H setting
(21H to 23H) setting
(24H to 26H) setting
(27H to 29H) setting
(3EH)←00H setting
Internal CPU reset
Transfer ending
← 02H setting
← 03H setting
Reset register
After 70 µsec
(refer to 4.7)
(Serial bus)
Instruction
download
Return
← 00H
Data Sheet S15082EJ4V0DS
(b) Transfer below 128 bytes
Internal CPU reset is canceled
Destination address register
Number of transfer bytes /4
iROM → SDRAM transfer
Source address register
Transfer counter register
Transfer mode register
Reset register (3EH)
(21H to 23H) setting
(24H to 26H) setting
(27H to 29H) setting
(20H) ←10H setting
Internal CPU reset
(3EH)←00H setting
Transfer ending
← 02H setting
Reset register
(refer to 4.7)
(Serial bus)
Instruction
download
Return
µ
PD61051, 61052
55