MC68HC908JK8CP Freescale Semiconductor, MC68HC908JK8CP Datasheet - Page 103

• Manufacturer Part Number: MC68HC908JK8CP
• Manufacturer: Freescale Semiconductor

Specifications of MC68HC908JK8CP

• Cpu Family: HC08
• Device Core Size: 8b
• Frequency (max): 8MHz
• Interface Type: SCI
• Program Memory Type: Flash
• Program Memory Size: 8KB
• Total Internal Ram Size: 256Byte
• # I/os (max): 15
• 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: 13-chx8-bit
• Instruction Set Architecture: CISC
• Operating Temp Range: -40C to 85C
• Operating Temperature Classification: Industrial
• Mounting: Through Hole
• Pin Count: 20
• Package Type: PDIP
• Lead Free Status / Rohs Status: Not Compliant

7.5.8 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 2 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 $EF00–$EE7F page to the data array in RAM. The
initialization subroutine is the same as the coding example for EE_WRITE (see
EE_READ
MAIN:
Freescale Semiconductor
BSR
:
:
LDHX
JSR
:
Routine Name
Routine Description
Calling Address
Stack Used
Data Block Format
1. The start address must be a page boundary start address: $xx00, $xx40, $xx80, or $00C0.
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 2 to 15. If the FLASH page is
programmed with a data array with a different size, the EE_READ call will
be ignored.
MC68HC908JL8/JK8 • MC68HC08JL8/JK8 • MC68HC908KL8 Data Sheet, Rev. 3.1
EQU
INITIALIZATION
FILE_PTR
EE_READ
$FDD0
Table 7-18. EE_READ Routine
EE_READ
Emulated EEPROM read. Data size ranges from 2 to 15 bytes at
a time.
$FDD0
16 bytes
Bus speed (BUS_SPD)
Data size (DATASIZE)
Starting address (ADDRH)
Starting address (ADDRL)
Data 1
Data N
:
NOTE
(1)
(1)
7.5.7
ROM-Resident Routines
EE_WRITE).
7.5.7
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