参数资料
型号: MPC857DSLVR50B
厂商: Freescale Semiconductor
文件页数: 8/88页
文件大小: 0K
描述: IC MPU POWERQUICC 50MHZ 357-PBGA
标准包装: 44
系列: MPC8xx
处理器类型: 32-位 MPC8xx PowerQUICC
速度: 50MHz
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
MPC862/857T/857DSL PowerQUICC Family Hardware Specifications, Rev. 3
16
Freescale Semiconductor
Bus Signal Timing
Table 7 provides the bus operation timing for the MPC862/857T/857DSL at 33 MHz, 40 Mhz, 50 MHz
and 66 Mhz.
The timing for the MPC862/857T/857DSL bus shown assumes a 50-pF load for maximum delays and a
0-pF load for minimum delays.
Table 7. Bus Operation Timings
Num
Characteristic
33 MHz
40 MHz
50 MHz
66 MHz
Unit
Min
Max
Min
Max
Min
Max
Min
Max
B1
CLKOUT period
30.30
25.00
30.30
20.00
30.30
15.15
30.30
ns
B1a
EXTCLK to CLKOUT phase skew
(EXTCLK > 15 MHz and MF <= 2)
-0.90
0.90
-0.90
0.90
-0.90
0.90
-0.90
0.90
ns
B1b
EXTCLK to CLKOUT phase skew
(EXTCLK > 10 MHz and MF < 10)
-2.30
2.30
-2.30
2.30
-2.30
2.30
-2.30
2.30
ns
B1c
CLKOUT phase jitter (EXTCLK > 15
MHz and MF <= 2) 1
-0.60
0.60
-0.60
0.60
-0.60
0.60
-0.60
0.60
ns
B1d
CLKOUT phase jitter1
-2.00
2.00
-2.00
2.00
-2.00
2.00
-2.00
2.00
ns
B1e
CLKOUT frequency jitter (MF < 10) 1
0.50
0.50
0.50
0.50
%
B1f
CLKOUT frequency jitter (10 < MF <
500) 1
2.00
2.00
2.00
2.00
%
B1g
CLKOUT frequency jitter (MF > 500) 1
3.00
3.00
3.00
3.00
%
B1h
Frequency jitter on EXTCLK 2
0.50
0.50
0.50
0.50
%
B2
CLKOUT pulse width low (MIN = 0.040
x B1)
12.10
10.00
8.00
6.10
ns
B3
CLKOUT width high (MIN = 0.040 x
B1)
12.10
10.00
8.00
6.10
ns
B4
CLKOUT rise time 3 (MAX = 0.00 x B1
+ 4.00)
4.00
4.00
4.00
4.00
ns
B533 CLKOUT fall time3 (MAX = 0.00 x B1 +
4.00)
4.00
4.00
4.00
4.00
ns
B7
CLKOUT to A(0:31), BADDR(28:30),
RD/WR, BURST, D(0:31), DP(0:3)
invalid (MIN = 0.25 x B1)
7.60
6.30
5.00
3.80
ns
B7a
CLKOUT to TSIZ(0:1), REG, RSV,
AT(0:3), BDIP, PTR invalid (MIN = 0.25
x B1)
7.60
6.30
5.00
3.80
ns
B7b
CLKOUT to BR, BG, FRZ, VFLS(0:1),
VF(0:2) IWP(0:2), LWP(0:1), STS
invalid 4 (MIN = 0.25 x B1)
7.60
6.30
5.00
3.80
ns
B8
CLKOUT to A(0:31), BADDR(28:30)
RD/WR, BURST, D(0:31), DP(0:3)
valid (MAX = 0.25 x B1 + 6.3)
7.60
13.80
6.30
12.50
5.00
11.30
3.80
10.00
ns
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