MC68HC705X32CFU Freescale Semiconductor, MC68HC705X32CFU Datasheet - Page 194

• Manufacturer Part Number: MC68HC705X32CFU
• Manufacturer: Freescale Semiconductor

Specifications of MC68HC705X32CFU

• Cpu Family: HC05
• Device Core Size: 8b
• Frequency (max): 4MHz
• Interface Type: SCI
• Program Memory Type: EPROM
• Program Memory Size: 32KB
• Total Internal Ram Size: 528Byte
• # I/os (max): 32
• Number Of Timers - General Purpose: 1
• Operating Supply Voltage (typ): 5V
• Operating Supply Voltage (max): 5.5V
• Operating Supply Voltage (min): 4.5V
• On-chip Adc: 8-chx8-bit
• Instruction Set Architecture: CISC
• Operating Temp Range: -40C to 85C
• Operating Temperature Classification: Industrial
• Mounting: Surface Mount
• Pin Count: 64
• Package Type: PQFP
• Lead Free Status / Rohs Status: Supplier Unconfirmed

15
E1LAT — EEPROM programming latch enable bit
STOP, power-on and external reset clear the E1LAT bit.
Note:
When the charge pump generator is on, the resulting high voltage is applied to the EEPROM array.
This bit cannot be set before the data is selected, and once this bit has been set it can only be
cleared by clearing the E1LAT bit.
A summary of the effects of setting/clearing bits 0, 1 and 2 of the control register are given in
Table
Note:
B-3.
1 (set)
0 (clear) –
1) E1PGM — EEPROM charge pump enable/disable
1 (set)
0 (clear) –
After the t
to zero in order to clear the E1ERA bit and the E1PGM bit.
The E1PGM and E1ERA bits are cleared when the E1LAT bit is at zero.
–
–
E1ERA
Freescale Semiconductor, Inc.
ERA1
program or erase operations, providing the E1PGM bit is cleared.
bit are reset to zero when E1LAT is ‘0’.
Address and data can be latched into the EEPROM for further
Data can be read from the EEPROM. The E1ERA bit and the E1PGM
Internal charge pump generator switched on.
Internal charge pump generator switched off.
0
0
0
1
1
Table B-3 EEPROM1 control bits description
For More Information On This Product,
erase time or t
E1LAT E1PGM
0
1
1
1
1
Go to: www.freescale.com
0
0
1
0
1
MC68HC705X32
PROG1
Read condition
Ready to load address/data for program/erase
Byte programming in progress
Ready for byte erase (load address)
Byte erase in progress
programming time, the E1LAT bit has to be reset
Description
MC68HC05X16
Rev. 1