MC908JL16CFJE Freescale Semiconductor, MC908JL16CFJE Datasheet - Page 38

• Manufacturer Part Number: MC908JL16CFJE
• Description: IC MCU 16K FLASH 8MHZ 32-LQFP
• Manufacturer: Freescale Semiconductor
• Series: HC08r

Specifications of MC908JL16CFJE

• Core Processor: HC08
• Core Size: 8-Bit
• Speed: 8MHz
• Connectivity: I²C, SCI
• Peripherals: LED, LVD, POR, PWM
• Number Of I /o: 26
• Program Memory Size: 16KB (16K x 8)
• Program Memory Type: FLASH
• Ram Size: 512 x 8
• Voltage - Supply (vcc/vdd): 2.7 V ~ 5.5 V
• Data Converters: A/D 13x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 32-LQFP
• Processor Series: HC08JL
• Core: HC08
• Data Bus Width: 8 bit
• Data Ram Size: 512 B
• Interface Type: SCI
• Maximum Clock Frequency: 8 MHz
• Number Of Programmable I/os: 26
• Number Of Timers: 4
• Operating Supply Voltage: 2.7 V to 5.5 V
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Development Tools By Supplier: FSICEBASE, DEMO908JL16E, M68CBL05CE
• Minimum Operating Temperature: - 40 C
• On-chip Adc: 13-ch x 10-bit
• Controller Family/series: HC08
• No. Of I/o's: 26
• Ram Memory Size: 512Byte
• Cpu Speed: 8MHz
• No. Of Timers: 2
• Embedded Interface Type: I2C, SCI, SPI
• Rohs Compliant: Yes
• For Use With: DEMO908JL16E - BOARD DEMO FOR MC908JL16
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

Memory
2.5.6 FLASH Block Protection
Due to the ability of the on-board charge pump to erase and program the FLASH memory in the target
application, provision is made to protect blocks of memory from unintentional erase or program operations
due to system malfunction. This protection is done by use of a FLASH block protect register (FLBPR).
The FLBPR determines the range of the FLASH memory which is to be protected. The range of the
protected area starts from a location defined by FLBPR and ends to the bottom of the FLASH memory
($FFFF). When the memory is protected, the HVEN bit cannot be set in either erase or program
operations.
When the FLBPR is program with all 0s, the entire memory is protected from being programmed and
erased. When all the bits are erased (all 1s), the entire memory is accessible for program and erase.
When bits within the FLBPR are programmed, they lock a block of memory, address ranges as shown in
2.5.7 FLASH Block Protect
erase or program of the FLBPR or the protected block of FLASH memory is prohibited. The FLBPR itself
can be erased or programmed only with an external voltage, V
also allows entry from reset into the monitor mode.
2.5.7 FLASH Block Protect Register
The FLASH block protect register (FLBPR) is implemented as a byte within the FLASH memory, and
therefore can only be written during a programming sequence of the FLASH memory. The value in this
register determines the starting location of the protected range within the FLASH memory.
BPR[7:0] — FLASH Block Protect Bits
38
BPR[7:0] represent bits [13:6] of a 16-bit memory address. Bits [15:14] are 1s and bits [5:0] are 0s.
The resultant 16-bit address is used for specifying the start address of the FLASH memory for block
protection. The FLASH is protected from this start address to the end of FLASH memory, at $FFFF.
With this mechanism, the protect start address can be XX00, XX40, XX80, or XXC0 (at page
boundaries — 64 bytes) within the FLASH memory.
Non-volatile FLASH register; write by programming.
Start address of FLASH
Address: $FFCF
In performing a program or erase operation, the FLASH block protect
register must be read after setting the PGM or ERASE bit and before
asserting the HVEN bit
Reset:
Read:
Write:
block protect
BPR7
Bit 7
Figure 2-5. FLASH Block Protect Register (FLBPR)
Register. Once the FLBPR is programmed with a value other than $FF, any
1
BPR6
6
1
MC68HC908JL16 Data Sheet, Rev. 1.1
BPR5
5
Unaffected by reset; $FF when blank
NOTE
BPR[7:0]
BPR4
4
16-bit memory address
BPR3
3
TST
, present on the IRQ pin. This voltage
BPR2
2
0
0
BPR1
0
1
0
Freescale Semiconductor
0
BPR0
Bit 0
0