MPC875 Freescale Semiconductor, Inc, MPC875 Datasheet - Page 20

• Manufacturer Part Number: MPC875
• Description: Mpc875 Powerquicc Integrated Communications Processor
• Manufacturer: Freescale Semiconductor, Inc

Bus Signal Timing
20
B27a
B28a
B28b
B28d
B29a
B29b
Num
B28c
B29c
B25
B26
B27
B28
B29
CLKOUT rising edge to OE,
WE(0:3)/BS_B[0:3] asserted
(MAX = 0.00 × B1 + 9.00)
CLKOUT rising edge to OE negated
(MAX = 0.00 × B1 + 9.00)
A(0:31) and BADDR(28:30) to CS asserted
GPCM ACS = 10, TRLX = 1
(MIN = 1.25 × B1 – 2.00)
A(0:31) and BADDR(28:30) to CS asserted
GPCM ACS = 11, TRLX = 1
(MIN = 1.50 × B1 – 2.00)
CLKOUT rising edge to WE(0:3)/BS_B[0:3]
negated GPCM write access CSNT = 0
(MAX = 0.00 × B1 + 9.00)
CLKOUT falling edge to WE(0:3)/BS_B[0:3]
negated GPCM write access TRLX = 0,
CSNT = 1, EBDF = 0
(MAX = 0.25 × B1 + 6.80)
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)
CLKOUT falling edge to WE(0:3)/BS_B[0:3]
negated GPCM write access TRLX = 0,
CSNT = 1 write access TRLX = 0, CSNT = 1,
EBDF = 1 (MAX = 0.375 × B1 + 6.6)
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)
WE(0:3)/BS_B[0:3] negated to D(0:31) High-Z
GPCM write access, CSNT = 0, EBDF = 0
(MIN = 0.25 × B1 – 2.00)
WE(0:3)/BS_B[0:3] negated to D(0:31) High-Z
GPCM write access, TRLX = 0, CSNT = 1,
EBDF = 0 (MIN = 0.50 × B1 – 2.00)
CS negated to D(0:31) High-Z GPCM write
access, ACS = 00, TRLX = 0 and CSNT = 0
(MIN = 0.25 × B1 – 2.00)
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)
Characteristic
MPC875/MPC870 PowerQUICC™ Hardware Specifications, Rev. 4
Table 10. Bus Operation Timings (continued)
35.90
43.50
10.90 18.00 10.90 18.00
13.20
13.20
2.00
7.60
5.60
5.60
Min
—
—
—
—
33 MHz
14.30
14.30
18.00
Max
9.00
9.00
9.00
—
—
—
—
—
—
29.30
35.50
10.50
10.50
2.00
6.30
4.30
4.30
Min
—
—
—
40 MHz
13.00
13.00
18.00
Max
9.00
9.00
9.00
—
—
—
—
—
—
16.90
20.70
2.00
3.80
5.20
1.80
5.60
1.80
5.60
Min
—
—
—
66 MHz
10.50
10.50
12.30
12.30
Max
9.00
9.00
9.00
—
—
—
—
—
—
Freescale Semiconductor
13.60
16.75
2.00
3.13
4.69
1.13
4.25
1.13
4.25
Min
—
—
—
—
80 MHz
11.30
11.29
Max
9.00
9.00
9.00
9.93
9.93
—
—
—
—
—
—
Unit
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns