MC908AP32CFBE Freescale, MC908AP32CFBE Datasheet - Page 134

• Manufacturer Part Number: MC908AP32CFBE
• Manufacturer: Freescale

Specifications of MC908AP32CFBE

• Cpu Family: HC08
• Device Core Size: 8b
• Frequency (max): 8MHz
• Interface Type: SCI/SPI
• Total Internal Ram Size: 2KB
• # I/os (max): 32
• Number Of Timers - General Purpose: 4
• Operating Supply Voltage (typ): 3.3/5V
• Operating Supply Voltage (max): 5.5V
• Operating Supply Voltage (min): 2.7V
• On-chip Adc: 8-chx10-bit
• Instruction Set Architecture: CISC
• Operating Temp Range: -40C to 85C
• Operating Temperature Classification: Industrial
• Mounting: Surface Mount
• Pin Count: 44
• Package Type: PQFP
• Program Memory Type: Flash
• Program Memory Size: 32KB
• Lead Free Status / RoHS Status: Compliant

Monitor ROM (MON)
8.5.7 EE_READ
EE_READ is used to load the data array in RAM with a set of data from FLASH.
The EE_READ routine reads data stored by the EE_WRITE routine. An EE_READ call will retrieve the
last data written to a FLASH page and loaded into the data array in RAM. Same as EE_WRITE, the data
size indicated by DATASIZE is 7 to 15, and the start address ADDRH:ADDRL must the FLASH page
boundary address.
The coding example below uses the data stored by the EE_WRITE coding example (see
EE_WRITE). It loads the 15-byte data set stored in the $EE00–$EFFF page to the data array in RAM.
The initialization subroutine is the same as the coding example for EE_WRITE (see
EE_READ
MAIN:
134
BSR
:
:
LDHX
JSR
:
1. The start address must be a page boundary start address.
The EE_READ routine is unable to check for incorrect data blocks, such as
the FLASH page boundary address and data size. It is the responsibility of
the user to ensure the starting address indicated in the data block is at the
FLASH page boundary and the data size is 7 to 15. If the FLASH page is
programmed with a data array with a different size, the EE_READ call will
be ignored.
Routine Description
Data Block Format
EQU
INITIALIZATION
#FILE_PTR
EE_READ
Calling Address
Routine Name
Stack Used
$FD5B
MC68HC908AP Family Data Sheet, Rev. 4
Table 8-17. EE_READ Routine
EE_READ
Emulated EEPROM read. Data size ranges from 7 to 15 bytes at
a time.
$FD5B
18 bytes
Bus speed (BUS_SPD)
Data size (DATASIZE)
Starting address (ADDRH)
Starting address (ADDRL)
Data 1
Data N
:
NOTE
(1)
(1)
Freescale Semiconductor
8.5.6
8.5.6
EE_WRITE).