mpc5644a Freescale Semiconductor, Inc, mpc5644a Datasheet - Page 118

• Manufacturer Part Number: mpc5644a
• Description: Mpc5644a Microcontroller Data Sheet
• Manufacturer: Freescale Semiconductor, Inc

Electrical characteristics
3.17.7
3.17.8
DSPI channel frequency support for the MPC5644A MCU is shown in
118
1
System Clock
#
1
2
#
1
2
3
4
5
6
7
8
eMIOS timing specified at f
50 pF with SRC = 0b00.
(MHz)
150
120
80
t
t
t
t
t
t
t
PCSC
t
PASC
MOPW
t
SCK
CSC
ASC
SDC
MIPW
eMIOS timing
DSPI timing
DIS
t
Symbol
Symbol
A
CC
CC
CC
CC
CC
CC
CC
CC
CC
CC
Non-LVDS
Non-LVDS
Non-LVDS
DSPI Use
Mode
LVDS
LVDS
LVDS
C
D
P
P
D
P
D
P
P
C
D
D
SCK Cycle Time
PCS to SCK Delay
After SCK Delay
Slave Access Time
(SS active to SOUT driven)
Slave SOUT Disable Time
(SS inactive to SOUT High-Z or
invalid)
SCK Duty Cycle
PCSx to PCSS time
PCSS to PCSx time
eMIOS Output Pulse Width
eMIOS Input Pulse Width
SYS
Preliminary—Subject to Change Without Notice
Table 44. DSPI channel frequency support
= 80 MHz, V
MPC5644A Microcontroller Data Sheet, Rev. 4
Characteristic
Max. Usable
Frequency
(MHz)
18.75
37.5
40
20
40
20
8
Table 45. DSPI timing
Table 43. eMIOS timing
3,4,5
6
DD
Characteristic
= 1.14 V to 1.32 V, V
Use sysclock /4 divide ratio.
Use sysclock /8 divide ratio.
Use sysclock /3 divide ratio. Gives 33/66 duty cycle. Use DSPI
configuration DBR=0b1 (double baud rate), BR=0b0000 (scaler
value 2) and PBR=0b01 (prescaler value 3).
Use sysclock /6 divide ratio.
Use sysclock /2 divide ratio.
Use sysclock /4 divide ratio.
Table
Condition
1,2
DDEH
1
44. Timing specifications are in
= 4.5 V to 5.5 V, T
Notes
Value
(
Min.
½
24.4 ns
4
1
Min.
22
21
t
4
5
SC
—
—
10
11
7
9
)–2
A
= T
Freescale Semiconductor
Value
Max.
(
—
—
½
L
2.9 ms
Max.
to T
t
25
25
—
—
SC
—
—
)+2
H
, and C
Table
Unit
t
t
CYC
CYC
Unit
ns
ns
ns
ns
ns
ns
ns
—
45.
L
=