Datasheet

MPC852T PowerQUICC™ Hardware Specifications, Rev. 4
Freescale Semiconductor 19
Bus Signal Timing
B30b WE(0:3)/BS_B[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
(MIN = 1.50 × B1 – 2.00)
43.50 — 35.50 — 28.00 — 20.70 — ns
B30c WE
(0:3)/BS_B[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
(MIN = 0.375 × B1 – 3.00)
8.40 — 6.40 — 4.50 — 2.70 — ns
B30d WE
(0:3)/BS_B[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 11,
EBDF = 1
38.67 — 31.38 — 24.50 — 17.83 — ns
B31 CLKOUT falling edge to CS
valid - as
requested by control bit CST4 in the
corresponding word in the UPM
(MAX = 0.00 × B1 + 6.00)
1.50 6.00 1.50 6.00 1.50 6.00 1.50 6.00 ns
B31a CLKOUT falling edge to CS
valid - as
requested by control bit CST1 in the
corresponding word in the UPM
(MAX = 0.25 × B1 + 6.80)
7.60 14.30 6.30 13.00 5.00 11.80 3.80 10.50 ns
B31b CLKOUT rising edge to CS
valid - as
requested by control bit CST2 in the
corresponding word in the UPM
(MAX = 0.00 × B1 + 8.00)
1.50 8.00 1.50 8.00 1.50 8.00 1.50 8.00 ns
B31c CLKOUT rising edge to CS
valid- as
requested by control bit CST3 in the
corresponding word in the UPM
(MAX = 0.25 × B1 + 6.30)
7.60 13.80 6.30 12.50 5.00 11.30 3.80 10.00 ns
B31d CLKOUT falling edge to CS
valid, as
requested by control bit CST1 in the
corresponding word in the UPM EBDF = 1
(MAX = 0.375 × B1 + 6.6)
13.30 18.00 11.30 16.00 9.40 14.10 7.60 12.30 ns
B32 CLKOUT falling edge to BS
valid- as
requested by control bit BST4 in the
corresponding word in the UPM
(MAX = 0.00 × B1 + 6.00)
1.50 6.00 1.50 6.00 1.50 6.00 1.50 6.00 ns
Table 9. Bus Operation Timings (continued)
Num Characteristic
33 MHz 40 MHz 50 MHz 66 MHz
Unit
Min Max Min Max Min Max Min Max