參數(shù)資料
型號(hào)： MPC880VR80
廠商： Freescale Semiconductor
文件頁(yè)數(shù)： 16/87頁(yè)
文件大小： 0K
描述： IC MPU POWERQUICC 80MHZ 357PBGA
標(biāo)準(zhǔn)包裝： 44
系列： MPC8xx
處理器類型： 32-位 MPC8xx PowerQUICC
速度： 80MHz
電壓： 3.3V
安裝類型： 表面貼裝
封裝/外殼： 357-BBGA
供應(yīng)商設(shè)備封裝： 357-PBGA（25x25）
包裝： 托盤
MPC885/MPC880 PowerQUICC Hardware Specifications, Rev. 7
Freescale Semiconductor
23
Bus Signal Timing
B36
A(0:31), BADDR(28:30), and D(0:31) to GPL
valid, as requested by control bit GxT4 in the
corresponding word in the UPM
(MIN = 0.25
× B1 – 2.00)
5.60
—
4.30
—
1.80
—
1.13
—
ns
B37
UPWAIT valid to CLKOUT falling edge9
(MIN = 0.00
× B1 + 6.00)
6.00
—
6.00
—
6.00
—
6.00
—
ns
B38
CLKOUT falling edge to UPWAIT valid 9
(MIN = 0.00
× B1 + 1.00)
1.00
—
1.00
—
1.00
—
1.00
—
ns
B39
AS valid to CLKOUT rising edge10
(MIN = 0.00
× B1 + 7.00)
7.00
—
7.00
—
7.00
—
7.00
—
ns
B40
A(0:31), TSIZ(0:1), RD/WR, BURST, valid to
CLKOUT rising edge (MIN = 0.00
× B1 + 7.00)
7.00
—
7.00
—
7.00
—
7.00
—
ns
B41
TS valid to CLKOUT rising edge (setup time)
(MIN = 0.00
× B1 + 7.00)
7.00
—
7.00
—
7.00
—
7.00
—
ns
B42
CLKOUT rising edge to TS valid (hold time)
(MIN = 0.00
× B1 + 2.00)
2.00
—
2.00
—
2.00
—
2.00
—
ns
B43
AS negation to memory controller signals
negation (MAX = TBD)
—TBD
ns
1 For part speeds above 50 MHz, use 9.80 ns for B11a.
2 The timing required for BR input is relevant when the MPC885/MPC880 is selected to work with the internal bus arbiter. The
timing for BG input is relevant when the MPC885/MPC880 is selected to work with the external bus arbiter.
3 For part speeds above 50 MHz, use 2 ns for B17.
4 The D(0:31) input timings B18 and B19 refer to the rising edge of the CLKOUT in which the TA input signal is asserted.
5 For part speeds above 50 MHz, use 2 ns for B19.
6 The D(0:31) input timings B20 and B21 refer to the falling edge of the CLKOUT. This timing is valid only for read accesses
controlled by chip-selects under control of the user-programmable machine (UPM) in the memory controller, for data beats
where DLT3 = 1 in the RAM words. (This is only the case where data is latched on the falling edge of CLKOUT.)
7 This formula applies to bus operation up to 50 MHz.
8 The timing B30 refers to CS when ACS = 00 and to CS and WE(0:3) when CSNT = 0.
9 The signal UPWAIT is considered asynchronous to the CLKOUT and synchronized internally. The timings specified in B37 and
B38 are specified to enable the freeze of the UPM output signals as described in Figure 21.
10 The AS signal is considered asynchronous to the CLKOUT. The timing B39 is specified in order to allow the behavior specified
Table 9. Bus Operation Timings (continued)
Num
Characteristic
33 MHz
40 MHz
66 MHz
80 MHz
Unit
Min
Max
Min
Max
Min
Max
Min
Max
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