mpc8378 Freescale Semiconductor, Inc, mpc8378 Datasheet - Page 36

• Manufacturer Part Number: mpc8378
• Description: Powerquicc Ii Pro Processor
• Manufacturer: Freescale Semiconductor, Inc

Local Bus
36
Local bus clock to output high impedance for LAD/LDP
Output hold from local bus clock for LAD/LDP
Note:
1
2
3
4
5
6
7
8
The symbols used for timing specifications herein follow the pattern of t
for inputs and t
timing (LB) for the input (I) to go invalid (X) with respect to the time the t
clock one(1). Also, t
the output (O) going invalid (X) or output hold time.
All timings are in reference to rising edge of LSYNC_IN at LBV
All signals are measured from LBV
Input timings are measured at the pin.
t
output pins.
t
LAD output pins.
t
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.
LBOTOT1
LBOTOT2
LBOTOT3
should be used when LBCR[AHD] is set and the load on LALE output pin is at least 10pF less than the load on LAD
should be used when LBCR[AHD] is not set and the load on LALE output pin equals to the load on LAD output pins.
should be used when LBCR[AHD] is not set and the load on LALE output pin is at least 10pF less than the load on
Table 39. Local Bus General Timing Parameters—PLL Enable Mode (continued)
(First two letters of functional block)(reference)(state)(signal)(state)
LBKHOX
MPC8377E PowerQUICC II Pro Processor Hardware Specifications, Rev. 3
Parameter
symbolizes local bus timing (LB) for the t
DD
/2 of the rising/falling edge of LSYNC_IN to 0.5 × LBV
Symbol
t
t
DD
LBKHOZ
LBKHOX
/2 and the 0.4 × LBV
for outputs. For example, t
LBK
(First two letters of functional block)(signal)(state) (reference)(state)
1
LBK
clock reference (K) to go high (H), with respect to
clock reference (K) goes high (H), in this case for
Min
—
1
DD
of the signal in question.
Max
DD
3.8
—
LBIXKH1
of the signal in question.
Freescale Semiconductor
symbolizes local bus
Unit
ns
ns
Notes
3, 8
3