Freescale Semiconductor MPC8358E, Hardware Specificftion

Page: 43 / 108

MPC8360E/MPC8358E PowerQUICC II Pro Processor Revision 2.x TBGA Silicon Hardware Specifications, Rev. 4
Freescale Semiconductor 43
Local Bus
Table 41 describes the general timing parameters of the local bus interface of the device.
Local bus clock to output high impedance for LAD/LDP t
LBKHOZ
— 3.8 ns —
Notes:
1. The symbols used for timing specifications 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, t
LBIXKH1
symbolizes local bus
timing (LB) for the input (I) to go invalid (X) with respect to the time the t
LBK
clock reference (K) goes high (H), in this case for
clock one (1). Also, t
LBKHOX
symbolizes local bus timing (LB) for the t
LBK
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 rising edge of LSYNC_IN.
3. All signals are measured from OV
DD
/2 of the rising edge of LSYNC_IN to 0.4
×
OV
DD
of the signal in question for 3.3-V
signaling levels.
4. Input timings are measured at the pin.
5. t
LBOTOT1
should be used when RCWH[LALE] is not set and when the load on LALE output pin is at least 10 pF less than the
load on LAD output pins.
6. t
LBOTOT2
should be used when RCWH[LALE] is set and when the load on LALE output pin is at least 10 pF less than the load
on LAD output pins.
7. t
LBOTOT3
should be used when RCWH[LALE] is set and when the load on LALE output pin equals to the load on LAD output
pins.
8. 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.
Table 41. Local Bus General Timing Parameters—DLL Bypass Mode
Parameter Symbol
1
Min Max Unit Notes
Local bus cycle time t
LBK
15 — ns 2
Input setup to local bus clock t
LBIVKH
7 — ns 3, 4
Input hold from local bus clock t
LBIXKH
1.0 — ns 3, 4
LALE output fall to LAD output transition (LATCH hold time) t
LBOTOT1
1.5 — ns 5
LALE output fall to LAD output transition (LATCH hold time) t
LBOTOT2
3 — ns 6
LALE output fall to LAD output transition (LATCH hold time) t
LBOTOT3
2.5 — ns 7
Local bus clock to output valid t
LBKHOV
— 3 ns 3
Table 40. Local Bus General Timing Parameters—DLL Enabled (continued)
Parameter Symbol
1
Min Max Unit Notes