MC68HC705KJ1CDW Freescale Semiconductor, MC68HC705KJ1CDW Datasheet - Page 26

• Manufacturer Part Number: MC68HC705KJ1CDW
• Description: IC MCU 4MHZ 1.2K OTP 16-SOIC
• Manufacturer: Freescale Semiconductor
• Series: HC05r

Specifications of MC68HC705KJ1CDW

• Core Processor: HC05
• Core Size: 8-Bit
• Speed: 4MHz
• Peripherals: POR, WDT
• Number Of I /o: 10
• Program Memory Size: 1.2KB (1.2K x 8)
• Program Memory Type: OTP
• Ram Size: 64 x 8
• Voltage - Supply (vcc/vdd): 3 V ~ 5.5 V
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 16-SOIC (0.300", 7.5mm Width)
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Eeprom Size: -
• Data Converters: -
• Connectivity: -

Memory
2.7.2 EPROM Programming Register
The EPROM programming register (EPROG) contains the control bits for programming the
EPROM/OTPROM.
ELAT — EPROM Bus Latch Bit
MPGM — MOR Programming Bit
EPGM — EPROM Programming Bit
Bits [7:3] — Reserved
Take the following steps to program a byte of EPROM/OTPROM:
2.7.3 EPROM Erasing
The erased state of an EPROM bit is logic 0. Erase the EPROM by exposing it to 15 Ws/cm
light with a wavelength of 2537 angstroms. Position the ultraviolet light source one inch from the EPROM.
Do not use a shortwave filter.
26
1. Apply the programming voltage, V
2. Set the ELAT bit.
3. Write to any EPROM/OTPROM address.
4. Set the EPGM bit and wait for a time, t
5. Clear the ELAT bit.
This read/write bit latches the address and data buses for EPROM/OTPROM programming. Clearing
the ELAT bit automatically clears the EPGM bit. EPROM/OTPROM data cannot be read while the
ELAT bit is set. Reset clears the ELAT bit.
This read/write bit applies programming power from the IRQ/V
clears MPGM.
This read/write bit applies the voltage from the IRQ/V
ELAT bit must be set already. Reset clears EPGM.
1 = Address and data buses configured for EPROM/OTPROM programming the EPROM
0 = Address and data buses configured for normal operation
1 = Programming voltage applied to MOR
0 = Programming voltage not applied to MOR
1 = Programming voltage (IRQ/V
0 = Programming voltage (IRQ/V
Address:
Writing logic 1s to both the ELAT and EPGM bits with a single instruction
sets ELAT and clears EPGM. ELAT must be set first by a separate
instruction.
Reset:
Read:
Write:
MC68HC705KJ1 • MC68HRC705KJ1 • MC68HLC705KJ1 Data Sheet, Rev. 4.1
$0018
Bit 7
Figure 2-3. EPROM Programming Register (EPROG)
0
0
= Unimplemented
R
6
0
0
PP
PP
PP
pin) applied to EPROM
pin) not applied to EPROM
R
5
0
0
, to the IRQ/V
EPGM
NOTE
.
R
R
4
0
0
PP
PP
= Reserved
pin to the EPROM. To write the EPGM bit, the
pin.
R
3
0
0
PP
pin to the mask option register. Reset
ELAT
2
0
MPGM
1
0
Freescale Semiconductor
EPGM
Bit 0
0
2
of ultraviolet