MM912F634DV1AER2 Freescale Semiconductor, MM912F634DV1AER2 Datasheet - Page 287
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MM912F634DV1AER2
Manufacturer Part Number
MM912F634DV1AER2
Description
16-bit Microcontrollers - MCU DUAL LS/HS SWITCH W. LIN
Manufacturer
Freescale Semiconductor
Datasheet
1.MM912G634DV1AE.pdf
(338 pages)
Specifications of MM912F634DV1AER2
Rohs
yes
Core
HCS12
Processor Series
MM912F634
Data Bus Width
16 bit
Maximum Clock Frequency
20 MHz
Program Memory Size
32 KB
Data Ram Size
2 KB
On-chip Adc
Yes
Operating Supply Voltage
4.5 V to 5.5 V
Operating Temperature Range
- 40 C to + 105 C
Package / Case
LQFP-48
Mounting Style
SMD/SMT
A/d Bit Size
10 bit
A/d Channels Available
15
Interface Type
SPI
Maximum Operating Temperature
+ 105 C
Minimum Operating Temperature
- 40 C
Number Of Programmable I/os
6
Number Of Timers
1
Program Memory Type
Flash
Supply Voltage - Max
4.5 V
Supply Voltage - Min
4.5 V
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Functional Description and Application Information
4.36.4.2.2
The program operation will program a previously erased address in the Flash memory using an embedded algorithm.
An example flow to execute the program operation is shown in
is as follows:
Freescale Semiconductor
1.
2.
3.
Write to an aligned Flash block address to start the command write sequence for the program command. The data
written will be programmed to the address written.
Write the program command, 0x20, to the FCMD register.
Clear the CBEIF flag in the FSTAT register by writing a 1 to CBEIF to launch the program command.
Program Command
Erase Verify
Status
Clock Register
Written
Check
Bit Polling for
Command Completion
Check
Access Error and
Protection Violation
Check
Command
Buffer Empty Check
Read: FCLKDIV register
2.
3.
1.
Figure 86. Example Erase Verify Command Flow
yes
FDIVLD
Write: FCMD register
Erase Verify Command 0x05
Write: FSTAT register
Clear CBEIF 0x80
START
Write: Flash Block Address
and Dummy Data
Set?
Read: FSTAT register
Read: FSTAT register
ACCERR/PVIOL
yes
BLANK
yes
CBEIF
yes
no
CCIF
Set?
Set?
Set?
EXIT
Write: FCLKDIV register
Set?
no
Flash Block
Erased
no
yes
no
no
Figure
Write: FSTAT register
Clear ACCERR/PVIOL 0x30
NOTE: FCLKDIV needs to
be set after each reset
87. The program command write sequence
32 kbyte Flash Module (S12SFTSR32KV1)
EXIT
Flash Block
Not Erased
MM912F634
287
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