MC68HC705B16CFN Freescale Semiconductor, MC68HC705B16CFN Datasheet - Page 259
Manufacturer Part Number
IC MCU 2.1MHZ 15K OTP 52-PLCC
Specifications of MC68HC705B16CFN
Number Of I /o
Program Memory Size
15KB (15K x 8)
Program Memory Type
256 x 8
352 x 8
Voltage - Supply (vcc/vdd)
4.5 V ~ 5.5 V
-40°C ~ 85°C
Package / Case
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
E6LAT — EPROM programming latch enable bit
STOP, power-on and external reset clear the E6LAT bit.
E6PGM — EPROM program enable bit
This bit is the EPROM program enable bit. It can be set to ‘1’ to enable programming only after
E6LAT is set and at least one byte is written to the EPROM. It is not possible to clear this bit using
software but clearing E6LAT will always clear E6PGM.
E1ERA — EEPROM erase/programming bit
Providing the E1LAT and E1PGM bits are at logic one, this bit indicates whether the access to the
EEPROM is for erasing or programming purposes.
Once the program/erase EEPROM address has been selected, E1ERA cannot be changed.
0 (clear) –
0 (clear) –
After the t
to zero in order to clear the E6PGM bit.
All combinations are not shown in the above table, since the E6PGM bit is cleared when
the E6LAT bit is at zero, and will result in a read condition.
Address and up to sixteen data bytes can be latched into the EPROM
for further programming providing the E6PGM bit is cleared. When
programming the EPROM, all other 15 addresses must be latched
with the erased state ($00) or corruption may occur.
Data can be read from the EPROM or firmware ROM; the E6PGM bit
is reset to zero when E6LAT is ‘0’.
An erase operation will take place.
A programming operation will take place.
erase time or t
Table H-2 EPROM control bits description
Read/execute in EPROM
Ready to write address/data to EPROM
programming in progress
programming time, the E6LAT bit has to be reset