Memory Controller
MPC561/MPC563 Reference Manual, Rev. 1.2
10-16
Freescale Semiconductor
Figure 10-12. Relaxed Timing — Write Access (ACS = 10, SCY = 0, CSNT = 0, TRLX = 1)
, note the following:
•
Because the TRLX bit is set, the assertion of the CS and WE strobes is delayed by one clock cycle.
•
Because ACS = 11, the assertion of CS is delayed an additional half clock cycle.
•
Because CSNT = 1, WE is negated one clock cycle earlier than normal. (Refer to
.) The
total cycle length is four clock cycles, determined as follows:
— The basic memory cycle requires two clock cycles.
— Two extra clock cycles are required due to the effect of TRLX on the assertion and negation of
the CS and WE strobes.
CLOCK
Address
TS
TA
CS
RD/
WR
WE
/
BE
Data
OE
ACS = 10
ACS = 00
Summary of Contents for MPC561
Page 84: ...MPC561 MPC563 Reference Manual Rev 1 2 lxxxiv Freescale Semiconductor...
Page 144: ...Signal Descriptions MPC561 MPC563 Reference Manual Rev 1 2 2 46 Freescale Semiconductor...
Page 206: ...Central Processing Unit MPC561 MPC563 Reference Manual Rev 1 2 3 62 Freescale Semiconductor...
Page 302: ...Reset MPC561 MPC563 Reference Manual Rev 1 2 7 14 Freescale Semiconductor...
Page 854: ...Time Processor Unit 3 MPC561 MPC563 Reference Manual Rev 1 2 19 24 Freescale Semiconductor...
Page 968: ...Development Support MPC561 MPC563 Reference Manual Rev 1 2 23 54 Freescale Semiconductor...
Page 1144: ...Internal Memory Map MPC561 MPC563 Reference Manual Rev 1 2 B 34 Freescale Semiconductor...
Page 1212: ...TPU3 ROM Functions MPC561 MPC563 Reference Manual Rev 1 2 D 60 Freescale Semiconductor...
Page 1216: ...Memory Access Timing MPC561 MPC563 Reference Manual Rev 1 2 E 4 Freescale Semiconductor...