參數(shù)資料
型號： MPC8572CVTAULD
廠商： FREESCALE SEMICONDUCTOR INC
元件分類： 微控制器/微處理器
英文描述： 32-BIT, 1333 MHz, MICROPROCESSOR, PBGA1023
封裝： 33 X 33 MM, LEAD FREE, PLASTIC, FCBGA-1023
文件頁數(shù)： 91/138頁
文件大小： 1502K
代理商： MPC8572CVTAULD
MPC8572E PowerQUICC III Integrated Processor Hardware Specifications, Rev. 2
56
Freescale Semiconductor
Local Bus Controller (eLBC)
Table 49 describes the general timing parameters of the local bus interface at BVDD = 2.5 V DC.
Local bus clock to LALE assertion
—
tLBKHOV4
—2.3
ns
3
Output hold from local bus clock (except LAD/LDP and
LALE)
—tLBKHOX1
0.7
—
ns
3
Output hold from local bus clock for LAD/LDP
—
tLBKHOX2
0.7
—
ns
3
Local bus clock to output high Impedance (except LAD/LDP
and LALE)
—tLBKHOZ1
—2.5
ns
5
Local bus clock to output high impedance for LAD/LDP
—
tLBKHOZ2
—2.5
ns
5
Note:
1. The symbols used for timing specifications herein follow the pattern of t(First two letters of functional block)(signal)(state) (reference)(state)
for inputs and t(First two letters of functional block)(reference)(state)(signal)(state) for outputs. For example, tLBIXKH1 symbolizes local bus
timing (LB) for the input (I) to go invalid (X) with respect to the time the tLBK clock reference (K) goes high (H), in this case for
clock one(1). Also, tLBKHOX symbolizes local bus timing (LB) for the tLBK clock reference (K) to go high (H), with respect to the
output (O) going invalid (X) or output hold time.
2. All timings are in reference to LSYNC_IN for PLL enabled and internal local bus clock for PLL bypass mode.
3. All signals are measured from BVDD/2 of the rising edge of LSYNC_IN for PLL enabled or internal local bus clock for PLL bypass
mode to 0.4
× BVDD of the signal in question for 3.3-V signaling levels.
4. Input timings are measured at the pin.
5. For purposes of active/float timing measurements, the Hi-Z or off state is defined to be when the total current delivered through
the component pin is less than or equal to the leakage current specification.
6. tLBOTOT is a measurement of the minimum time between the negation of LALE and any change in LAD. tLBOTOT is programmed
with the LBCR[AHD] parameter.
7. Maximum possible clock skew between a clock LCLK[m] and a relative clock LCLK[n]. Skew measured between complementary
signals at BVDD/2.
8. Guaranteed by design.
Table 49. Local Bus General Timing Parameters (BVDD = 2.5 V DC)—PLL Enabled
At recommended operating conditions with BVDD of 2.5 V ± 5%
Parameter
Configuration
Symbol 1
Min
Max
Unit
Notes
Local bus cycle time
—
tLBK
6.67
12
ns
2
Local bus duty cycle
—
tLBKH/tLBK
43
57
%
—
LCLK[n] skew to LCLK[m] or LSYNC_OUT
—
tLBKSKEW
—
150
ps
7, 8
Input setup to local bus clock (except
LGTA/LUPWAIT)
—tLBIVKH1
1.9
—
ns
3, 4
LGTA/LUPWAIT input setup to local bus clock
—
tLBIVKH2
1.8
—
ns
3, 4
Input hold from local bus clock (except
LGTA/LUPWAIT)
—tLBIXKH1
1.1
—
ns
3, 4
LGTA/LUPWAIT input hold from local bus clock
—
tLBIXKH2
1.1
—
ns
3, 4
LALE output transition to LAD/LDP output transition
(LATCH hold time)
—tLBOTOT
1.5
—
ns
6
Table 48. Local Bus General Timing Parameters (BVDD = 3.3 V DC)—PLL Enabled (continued)
At recommended operating conditions with BVDD of 3.3 V ± 5%. (continued)
Parameter
Configuration
Symbol 1
Min
Max
Unit
Notes
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