參數(shù)資料
型號: MPC870
廠商: 飛思卡爾半導(dǎo)體(中國)有限公司
英文描述: Hardware Specifications
中文描述: 硬件規(guī)格
文件頁數(shù): 13/84頁
文件大?。?/td> 1366K
代理商: MPC870
MPC875/MPC870 Hardware Specifications, Rev. 3.0
20
PRELIMINARY—SUBJECT TO CHANGE WITHOUT NOTICE
Freescale Semiconductor
Bus Signal Timing
B29f
WE(0:3/BS_B[0:3]) negated to D(0:31)
High-Z GPCM write access, TRLX = 0,
CSNT = 1, EBDF = 1
(MIN = 0.375
× B1 – 6.30)
5.00
3.00
0.00
0.00
ns
B29g
CS negated to D(0:31) High-Z GPCM write
access, TRLX = 0, CSNT = 1 ACS = 10 or
ACS = 11, EBDF = 1
(MIN = 0.375
× B1 – 6.30)
5.00
3.00
0.00
0.00
ns
B29h
WE(0:3)/BS_B[0:3] negated to D(0:31)
High-Z GPCM write access, TRLX = 1,
CSNT = 1, EBDF = 1
(MIN = 0.375
× B1 – 3.30)
38.40
31.10
17.50
13.85
ns
B29i
CS negated to D(0:31) (0:3) High-Z GPCM
write access, TRLX = 1, CSNT = 1,
ACS = 10 or ACS = 11, EBDF = 1
(MIN = 0.375
× B1 – 3.30)
38.40
31.10
17.50
13.85
ns
B30
CS, WE(0:3)/BS_B[0:3] negated to
A(0:31), BADDR(28:30) invalid GPCM
write access 7 (MIN = 0.25
× B1 – 2.00)
5.60
4.30
1.80
1.13
ns
B30a
WE(0:3)/BS_B[0:3] negated to A(0:31),
BADDR(28:30) invalid GPCM, write
access, TRLX = 0, CSNT = 1, CS negated
to A(0:31) invalid GPCM write access
TRLX = 0, CSNT =1 ACS = 10, or
ACS == 11, EBDF = 0
(MIN = 0.50
× B1 – 2.00)
13.20
10.50
5.60
4.25
ns
B30b
WE(0:3)/BS_B[0:3] negated to A(0:31)
Invalid GPCM BADDR(28:30) invalid
GPCM write access, TRLX = 1, CSNT = 1.
CS negated to A(0:31) invalid GPCM write
access TRLX = 1, CSNT = 1, ACS = 10, or
ACS == 11 EBDF = 0
(MIN = 1.50
× B1 – 2.00)
43.50
35.50
20.70
16.75
ns
B30c
WE(0:3)/BS_B[0:3] negated to A(0:31),
BADDR(28:30) invalid GPCM write
access, TRLX = 0, CSNT = 1. CS negated
to A(0:31) invalid GPCM write access,
TRLX = 0, CSNT = 1 ACS = 10,
ACS == 11, EBDF = 1
(MIN = 0.375
× B1 – 3.00)
8.40
6.40
2.70
1.70
ns
B30d
WE(0:3)/BS_B[0:3] negated to A(0:31),
BADDR(28:30) invalid GPCM write access
TRLX = 1, CSNT =1, CS negated to
A(0:31) invalid GPCM write access TRLX
= 1, CSNT = 1, ACS = 10 or 11, EBDF = 1
38.67
31.38
17.83
14.19
ns
Table 10. Bus Operation Timings (continued)
Num
Characteristic
33 MHz
40 MHz
66 MHz
80 MHz
Unit
Min
Max
Min
Max
Min
Max
Min
Max
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