UPD61052 NEC, UPD61052 Datasheet - Page 42

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

(2) Source address register
Until it releases a transfer mode after setting a transfer mode register, it isn't possible to change. The transfer error
occurs when rewriting this register before releasing a transfer mode. The relation with the address of SDRAM,
external instruction ROM is shown in Figure 3-2 and 3-3. The addressing of SDRAM becomes a 32 address by
4-word unit (128 bytes).
42
21H
22H
23H
Address
16 Mbit SDRAM by 2
16 Mbit SDRAM by 1
64 Mbit SDRAM by 2
128 Mbit SDRAM by 1
128 Mbit SDRAM by 2
128 Mbit SDRAM by 1
It sets the address of the data to transfer. It becomes effective in case of transfer from SDRAM or instruction ROM.
The relation with the SDRAM bank and address is shown in Table 3-1.
Memory
Bit7
Host CPU
interface register
21H to 23H
SDRAM address
Figure 3-3. Relation of Source Address and External Instruction ROM Address
Host CPU
interface register
21H to 23H
Extemal
instruction ROM
address
Bit6
Figure 3-2. Relation of Source Address and SDRAM Address
000000H to 07FFFFH
000000H to 07FFFFH
000000H to 0FFFFFH
000000H to 0FFFFFH
Table 3-1. Relation of SDRAM Bank and Address
Bank A
Bit5
0 0 0 0
Bank select
0 0 0 0
Bit4
SA15 to SA8
SA7 to SA0
Data Sheet S15082EJ4V0DS
200000H to 27FFFFH
200000H to 27FFFFH
200000H to 2FFFFFH
200000H to 2FFFFFH
Bit3
Bank B
Bit2
SA19 to SA16
100000H to 17FFFFH
100000H to 1FFFFFH
100000H to 1FFFFFH
Bit1
Bank C
-
The µPD61051/61052
adds 0 automatically
Bit0
0 0 0 0 0
R/W
R/W
R/W
R/W
300000H to 37FFFFH
300000H to 3FFFFFH
300000H to 3FFFFFH
µ
PD61051, 61052
Source address
Source address
Source address
Bank D
-