Datasheet

Table 38. Bus operation timing
1
(continued)
Spec Characteristic Symbol
66 MHz (Ext. bus freq.)
2, 3
Unit Notes
Min Max
10 D_ALE Negated to Address
Invalid
t
AAI
2.0/1.0
5
— ns The timing is for Asynchronous
external memory system.
ALE is measured at 50% of VDDE.
1. EBI timing specified at V
DD
= 1.08 V to 1.32 V, V
DDE
= 3.0 V to 3.6 V, T
A
= T
L
to T
H
, and C
L
= 30 pF with SIU_PCR[DSC] =
11b for ADDR/CTRL and SIU_PCR[SRC] = 11b for DATA/ALE.
2. Speed is the nominal maximum frequency. Max speed is the maximum speed allowed including frequency modulation
(FM).
3. Depending on the internal bus speed, set the SIU_ECCR[EBDF] bits correctly not to exceed maximum external bus
frequency. The maximum external bus frequency is 66 MHz.
4. Refer to D_CLKOUT pad timing in Table 10.
5. ALE hold time spec is temperature dependant. 1.0 ns spec applies for temperature range -40 to 0°C. 2.0ns spec applies to
temperatures > 0°C. This spec has no dependency on the SIU_ECCR[EBTS] bit.
D_CLKOUT
3
V
OL_F
V
OH_F
VDDE / 2
4
2
1
2
Figure 25. D_CLKOUT timing
Electrical characteristics
MPC5777C Microcontroller Data Sheet Data Sheet, Rev. 13, 08/2018.
NXP Semiconductors 61