参数资料
型号: MPC885VR66
厂商: Freescale Semiconductor
文件页数: 13/87页
文件大小: 0K
描述: IC MPU POWERQUICC 66MHZ 357PBGA
标准包装: 44
系列: MPC8xx
处理器类型: 32-位 MPC8xx PowerQUICC
速度: 66MHz
电压: 3.3V
安装类型: 表面贴装
封装/外壳: 357-BBGA
供应商设备封装: 357-PBGA(25x25)
包装: 托盘
MPC885/MPC880 PowerQUICC Hardware Specifications, Rev. 7
20
Freescale Semiconductor
Bus Signal Timing
B27a
A(0:31) and BADDR(28:30) to CS asserted
GPCM ACS = 11, TRLX = 1
(MIN = 1.50
× B1 – 2.00)
43.50
35.50
20.70
16.75
ns
B28
CLKOUT rising edge to WE(0:3) negated GPCM
write access CSNT = 0 (MAX = 0.00
× B1 + 9.00)
9.00
9.00
9.00
9.00
ns
B28a
CLKOUT falling edge to WE(0:3) negated GPCM
write access TRLX = 0, CSNT = 1, EBDF = 0
(MAX = 0.25
× B1 + 6.80)
7.60
14.30
6.30
13.00
3.80
10.50
3.13
9.93
ns
B28b
CLKOUT falling edge to CS negated GPCM write
access TRLX = 0, CSNT = 1 ACS = 10 or
ACS = 11, EBDF = 0 (MAX = 0.25
× B1 + 6.80)
14.30
13.00
10.50
9.93
ns
B28c
CLKOUT falling edge to WE(0:3) negated GPCM
write access TRLX = 0, CSNT = 1 write access
TRLX = 0, CSNT = 1, EBDF = 1
(MAX = 0.375
× B1 + 6.6)
10.90 18.00 10.90 18.00
5.20
12.30
4.69
11.29
ns
B28d
CLKOUT falling edge to CS negated GPCM write
access TRLX = 0, CSNT = 1, ACS = 10, or
ACS = 11, EBDF = 1 (MAX = 0.375
× B1 + 6.6)
18.00
18.00
12.30
11.30
ns
B29
WE(0:3) negated to D(0:31) High-Z GPCM write
access, CSNT = 0, EBDF = 0
(MIN = 0.25
× B1 – 2.00)
5.60
4.30
1.80
1.13
ns
B29a
WE(0:3) negated to D(0:31) High-Z GPCM write
access, TRLX = 0, CSNT = 1, EBDF = 0
(MIN = 0.50
× B1 – 2.00)
13.20
10.50
5.60
4.25
ns
B29b
CS negated to D(0:31) High-Z GPCM write
access, ACS = 00, TRLX = 0 & CSNT = 0
(MIN = 0.25
× B1 – 2.00)
5.60
4.30
1.80
1.13
ns
B29c
CS negated to D(0:31) High-Z 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
B29d
WE(0:3) negated to D(0:31) High-Z GPCM write
access, TRLX = 1, CSNT = 1, EBDF = 0
(MIN = 1.50
× B1 – 2.00)
43.50
35.50
20.70
16.75
ns
B29e
CS negated to D(0:31) High-Z 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
B29f
WE(0:3) negated to D(0:31) High-Z GPCM write
access, TRLX = 0, CSNT = 1, EBDF = 1
(MIN = 0.375
× B1 – 6.30)7
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)7
5.00
3.00
0.00
0.00
ns
Table 9. 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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