Datasheet

MPC5121E/MPC5123 Data Sheet, Rev. 5
Electrical and Thermal Characteristics
Freescale Semiconductor58
r
Figure 35. UDMA Out Device Terminates Transfer
Timing parameters are explained in Table 31.
Table 31. Timing Parameters UDMA Out Burst
ATA
Parameter
UDMA Out
Timing
Parameter
Value How to meet SpecID
t
ack
t
ack
t
ack(min)
= (time_ack × T) – (t
skew1
+ t
skew2
) calculate and program
time_ack.
1
A9.63
t
env
t
env
t
env(min)
= (time_env × T) – (t
skew1
+ t
skew2
)
t
env(max)
= (time_env × T) + (t
skew1
+ t
skew2
)
calculate and program
time_env .
1
A9.64
t
dvs
t
dvs
t
dvs
= (time_dvs × T) – (t
skew1
+ t
skew2
) calculate and program
time_dvs
.
1
A9.65
t
dvh
t
dvh
t
dvs
= (time_dvh × T) – (t
skew1
+ t
skew2
) calculate and program
time_dvh .
1
A9.66
t
cyc
t
cyc
t
cyc
= time_cyc × T – (t
skew1
+ t
skew2
) calculate and program
time_cyc
.
1
A9.67
t
2cyc
—
t
2cyc
= time_cyc × 2 × T calculate and program
time_cyc
.
1
A9.68
t
rfs1
t
rfs1
t
rfs1
= 1.6 × T + t
sui
+ t
co
+ t
buf
+ t
buf
— A9.69
—
t
dzfs
t
dzfs
= time_dzfs × T – (t
skew1
) calculate and program
time_dzfs .
1
A9.70
t
ss
t
ss
t
ss
= time_ss × T – (t
skew1
+ t
skew2
) calculate and program
time_ss.
1
A9.71
t
mli
t
dzfs_mli
t
dzfs_mli
= max(time_dzfs, time_mli) × T –
(t
skew1
+ t
skew2
)
— A9.72
t
li
t
li1
t
li1
> 0 — A9.73
ADDR
DMARQ
DMACK
DIOW
DIOR
Data Write
IORDY
buffer_en
t
ack
t
cyc
t
dzfs_mli
t
cvh
t
off
t
li2
t
rfs1