UPD61052 NEC, UPD61052 Datasheet - Page 52

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

4.2
download processing to speed up. In addition, it stores more than one piece of firmware in the instruction pool area of
SDRAM and it can be replaced depending on the need, too.
the transfer bytes / 4) is (program size +3)/ 4.
4.2.1
canceled on the way, the internal CPU sometime malfunction.
52
The host CPU downloads the firmware at the instruction RAM for the internal CPU.
When a host CPU is connected with the serial bus, the firmware can be downloaded from the external ROM for the
When transferring to the instruction RAM of the internal CPU, the transfer counter register setting value (number of
Host CPU transmits the firmware to instruction RAM of the internal CPU.
When transferring data continuously, transfer during resetting an internal CPU, If reset of internal CPU is can
Firmware Download
Host CPU to instruction RAM of internal CPU
Data Sheet S15082EJ4V0DS
Internal CPU reset is canceled
Transfer ending (refer to 4.7)
Destination address register
Host CPU→iRAM transfer
Transfer counter register
All instruction written ?
Transfer mode register
Transfer data register
(24H to 26H) setting
Reset register (3EH)
(Program size + 3)/4
(27H to 29H) setting
(3FH) ←Instruction
(3EH)←00H setting
(20H)←80H setting
to instruction RAM
Internal CPU reset
of internal CPU
← 02H setting
Reset register
Host CPU
Return
Y
N
µ
PD61051, 61052