MCF51QM128VHSR Freescale Semiconductor, MCF51QM128VHSR Datasheet - Page 49

• Manufacturer Part Number: MCF51QM128VHSR
• Description: 16-bit Microcontrollers - MCU ColdFireV1,128KFlash
• Manufacturer: Freescale Semiconductor

Specifications of MCF51QM128VHSR

• Rohs: yes
• Core: ColdFire V1
• Processor Series: MCF51QM128
• Data Bus Width: 16 bit
• Maximum Clock Frequency: 50 MHz
• Program Memory Size: 128 KB
• On-chip Adc: Yes
• Operating Supply Voltage: 1.71 V to 3.6 V
• Operating Temperature Range: - 40 C to + 105 C
• Package / Case: QFN-44
• Mounting Style: SMD/SMT

6.8
6.8.1 SPI switching specifications
The Serial Peripheral Interface (SPI) provides a synchronous serial bus with master and
slave operations. Many of the transfer attributes are programmable. The following tables
provide timing characteristics for classic SPI timing modes. See the SPI chapter of the
chip's Reference Manual for information about the modified transfer formats used for
communicating with slower peripheral devices.
All timing is shown with respect to 20% V
input signal transitions of 3 ns and a 50 pF maximum load on all SPI pins. All timing
assumes slew rate control is disabled and high drive strength is enabled for SPI output
pins.
Freescale Semiconductor, Inc.
Num.
10
11
1
2
3
4
5
6
7
8
9
Communication interfaces
t
Symbol
WSPSCK
t
SPSCK
t
t
Lead
t
t
t
t
f
Lag
t
t
t
HO
RO
SU
t
FO
op
HI
RI
FI
v
Frequency of operation
SPSCK period
Enable lead time
Enable lag time
Clock (SPSCK) high or low time
Data setup time (inputs)
Data hold time (inputs)
Data valid (after SPSCK edge)
Data hold time (outputs)
Rise time input
Fall time input
Rise time output
Fall time output
Description
MCF51QM128 Data Sheet, Rev. 6, 01/2012.
Table 32. SPI master mode timing
DD
and 70% V
f
BUS
t
2 x t
BUS
Min.
DD
1/2
1/2
21
—
—
—
/2048
0
0
BUS
- 30
, unless noted, as well as
t
BUS
2048 x
1024 x
f
Max.
BUS
t
t
BUS
BUS
25
25
—
—
—
—
—
- 25
/2
Communication interfaces
t
t
SPSCK
SPSCK
Unit
Hz
ns
ns
ns
ns
ns
ns
ns
ns
as defined
in
f
Comment
bus clock
BUS
t
BUS
Table
f
BUS
—
—
—
—
—
—
—
—
—
is the
= 1/
8.
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