参数资料
型号: KMPC875VR66
厂商: Freescale Semiconductor
文件页数: 32/84页
文件大小: 0K
描述: IC MPU POWERQUICC 66MHZ 256PBGA
标准包装: 2
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: 256-BGA
供应商设备封装: 256-PBGA(23x23)
包装: 托盘
MPC875/MPC870 PowerQUICC Hardware Specifications, Rev. 4
38
Freescale Semiconductor
Bus Signal Timing
Table 12 shows the PCMCIA timing for the MPC875/MPC870.
Table 12. PCMCIA Timing
Num
Characteristic
33 MHz
40 MHz
66 MHz
80 MHz
Unit
Min
Max
Min
Max
Min
Max
Min
Max
P44
A(0:31), REG valid to PCMCIA strobe
asserted1 (MIN = 0.75
× B1 – 2.00)
1 PSST = 1. Otherwise add PSST times cycle time.
PSHT = 0. Otherwise add PSHT times cycle time.
These synchronous timings define when the WAITA signals are detected in order to freeze (or relieve) the PCMCIA current
cycle. The WAITA assertion will be effective only if it is detected 2 cycles before the PSL timer expiration. See Chapter 16,
“PCMCIA Interface,” in the
MPC885 PowerQUICC Family Reference Manual.
20.70
16.70
9.40
7.40
ns
P45
A(0:31), REG valid to ALE negation1
(MIN = 1.00
× B1 – 2.00)
28.30
23.00
13.20
10.50
ns
P46
CLKOUT to REG valid
(MAX = 0.25
× B1 + 8.00)
7.60
15.60
6.30
14.30
3.80
11.80
3.13
11.13
ns
P47
CLKOUT to REG invalid
(MIN = 0.25
× B1 + 1.00)
8.60
7.30
4.80
4.125
ns
P48
CLKOUT to CE1, CE2 asserted
(MAX = 0.25
× B1 + 8.00)
7.60
15.60
6.30
14.30
3.80
11.80
3.13
11.13
ns
P49
CLKOUT to CE1, CE2 negated
(MAX = 0.25
× B1 + 8.00)
7.60
15.60
6.30
14.30
3.80
11.80
3.13
11.13
ns
P50
CLKOUT to PCOE, IORD, PCWE, IOWR
assert time (MAX = 0.00
× B1 + 11.00)
11.00
11.00
11.00
11.00
ns
P51
CLKOUT to PCOE, IORD, PCWE, IOWR
negate time (MAX = 0.00
× B1 + 11.00)
2.00
11.00
2.00
11.00
2.00
11.00
2.00
11.00
ns
P52
CLKOUT to ALE assert time
(MAX = 0.25
× B1 + 6.30)
7.60
13.80
6.30
12.50
3.80
10.00
3.13
9.40
ns
P53
CLKOUT to ALE negate time
(MAX = 0.25
× B1 + 8.00)
15.60
14.30
11.80
11.13
ns
P54
PCWE, IOWR negated to D(0:31)
invalid1 (MIN = 0.25
× B1–2.00)
5.60
4.30
1.80
1.125
ns
P55
WAITA and WAITB valid to CLKOUT
rising edge1 (MIN = 0.00
× B1 + 8.00)
8.00
8.00
8.00
8.00
ns
P56
CLKOUT rising edge to WAITA and
WAITB invalid1 (MIN = 0.00
× B1 + 2.00)
2.00
2.00
2.00
2.00
ns
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