參數(shù)資料
型號: IBM25403GCX-3JC76C2
元件分類: 微控制器/微處理器
英文描述: RISC PROCESSOR, PQFP16
封裝: PLASTIC, QFP-160
文件頁數(shù): 30/54頁
文件大?。?/td> 541K
代理商: IBM25403GCX-3JC76C2
IBM PowerPC 403GCX
36
SRAM, ROM, or I/O Write Request with Wait and Hold
Bank Register Bit Settings
Notes:
1. WBE2:3 are address bits 30:31 if the bus width is programmed as byte or halfword.
2. See Table 20 for WBE signal denitions based on bus width.
3. WBE signals can be read/write byte enables based on the setting of IOCR[BEM]. See waveform and note 3 on
4. When in Byte Enable Mode IOCR[BEM] = 1, the BLast signal appears on the multiplexed OE[XSize1][BLast] out-
put, as described in Table 4 on page 8.
5. Wait must be programmed to a value
(CSon + WEon + WEoff) and (CSon + OEon + WEoff).
If Wait > (CSon + WEon) and > (CSon + OEon), then all signals retain the values shown in cycle 4 until the Wait
time expires.
6. If Hold is programmed > 001, all signals retain the values shown in cycle 6 until the Hold timer expires.
SLF
Burst
Mode
Bus Width
Ready
Enable
Wait
States
CSon
OEon
WEon
WEoff
Hold
Bit 13
Bit 14
Bits 15:16
Bit 17
Bits 18:23
Bit 24
Bit 25
Bit 26
Bit 27
Bits 28:30
0 or 1
0
xx
0
00 0011
0 or 1
001
SysClk
A6:29,1
WBE2[A30],
WBE3[A31]
R/W
CSx5
OE4,5
WBE0:32,3,5
D0:31
Address
Valid
Data Out
CSon=0
CSon=1
CSon=0
WEon=0
CSon=1,0
WEon=0,1
CSon=1
WEon=1
Wait + 1 Cycle
Hold
WEoff=1
WEoff=0
1
2
3
4
5
6
7
8
BusError
Error?
CSon=0
OEon=0
CSon=1,0
OEon=0,1
CSon=1
OEon=1
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