mpc855t Freescale Semiconductor, Inc, mpc855t Datasheet - Page 18

• Manufacturer Part Number: mpc855t
• Description: Mpc855t Powerquicc Integrated Communications Processor
• Manufacturer: Freescale Semiconductor, Inc

Bus Signal Timing
18
B29d
B29e
B29g
B29h
B30a
B30b
B30d
Num
B30c
B29f
B29i
B30
B31
WE(0:3) negated to D(0:31), DP(0:3) High-Z
GPCM write access, TRLX = 1, CSNT = 1,
EBDF = 0
CS negated to D(0:31), DP(0:3) High-Z
GPCM write access, TRLX = 1, CSNT = 1,
ACS = 10, or ACS = 11, EBDF = 0
WE(0:3) negated to D(0:31), DP(0:3) High-Z
GPCM write access, TRLX = 0, CSNT = 1,
EBDF = 1
CS negated to D(0:31), DP(0:3) High-Z
GPCM write access, TRLX = 0, CSNT = 1,
ACS = 10, or ACS = 11, EBDF = 1
WE(0:3) negated to D(0:31), DP(0:3) High-Z
GPCM write access, TRLX = 1, CSNT = 1,
EBDF = 1
CS negated to D(0:31), DP(0:3) High-Z
GPCM write access, TRLX = 1, CSNT = 1,
ACS = 10, or ACS = 11, EBDF = 1
CS, WE(0:3) negated to A(0:31),
BADDR(28:30) invalid GPCM write access
WE(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
WE(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
WE(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
WE(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 ACS = 11, EBDF = 1
CLKOUT falling edge to CS valid—as
requested by control bit CST4 in the
corresponding word in UPM
Characteristic
MPC860 PowerQUICC™ Family Hardware Specifications, Rev. 8
Table 7. Bus Operation Timings (continued)
8
43.45
43.45
38.67
38.67
13.15
43.45
38.67
8.86
8.86
5.58
8.36
1.50
Min
33 MHz
Max
6.00
—
—
—
—
—
—
—
—
—
—
—
31.38
31.38
10.50
35.50
31.38
35.5
35.5
6.88
6.88
4.25
6.38
1.50
Min
40 MHz
Max
6.00
—
—
—
—
—
—
—
—
—
—
—
28.00
28.00
24.50
24.50
28.00
24.50
5.00
5.00
3.00
8.00
4.50
1.50
Min
50 MHz
Max
6.00
—
—
—
—
—
—
—
—
—
—
—
Freescale Semiconductor
20.73
29.73
17.83
17.83
20.73
17.83
3.18
3.18
1.79
5.58
2.68
1.50
Min
66 MHz
Max
6.00
—
—
—
—
—
—
—
—
—
—
—
Unit
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns