MCHC705JJ7CPE Freescale Semiconductor, MCHC705JJ7CPE Datasheet - Page 117

• Manufacturer Part Number: MCHC705JJ7CPE
• Description: IC MCU 8BIT 224 BYTES RAM 20PDIP
• Manufacturer: Freescale Semiconductor
• Series: HC05r

Specifications of MCHC705JJ7CPE

• Core Processor: HC05
• Core Size: 8-Bit
• Speed: 2.1MHz
• Connectivity: SIO
• Peripherals: POR, Temp Sensor, WDT
• Number Of I /o: 14
• Program Memory Size: 6KB (6K x 8)
• Program Memory Type: OTP
• Ram Size: 224 x 8
• Voltage - Supply (vcc/vdd): 2.7 V ~ 5.5 V
• Data Converters: A/D 4x12b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 20-DIP (0.300", 7.62mm)
• Processor Series: HC705JJ
• Core: HC05
• Data Bus Width: 8 bit
• Data Ram Size: 224 B
• Interface Type: SIOP
• Maximum Clock Frequency: 2.1 MHz
• Number Of Programmable I/os: 14
• Number Of Timers: 2
• Maximum Operating Temperature: + 85 C
• Mounting Style: Through Hole
• Minimum Operating Temperature: - 40 C
• On-chip Adc: 12 bit, 4 Channel
• Package: 20PDIP
• Family Name: HC05
• Maximum Speed: 2.1 MHz
• Operating Supply Voltage: 3.3|5 V
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Lead Free Status / Rohs Status: Details

PEPGM — PEPROM Program Control Bit
PEPRZF — PEPROM Row Zero Flag
12.3 PEPROM Programming
Factory-provided software for programming the PEPROM is available on the World Wide Web at:
The PEPROM can also be programmed by user software with the V
IRQ/V
Freescale Semiconductor
1. Select a PEPROM bit by writing to the PEBSR.
2. Set the PEPGM bit in the PESCR.
3. Wait for the programming time, t
4. Clear the PEPGM bit.
5. Move to next PEPROM bit to be programmed in step 1.
This read/write bit controls the switches that apply the programming voltage from the IRQ/V
the selected PEPROM bit cell. When the PEPGM bit is set, the selected bit cell will be programmed to
a logic 1, regardless of the state of the PEDATA bit. Reset clears the PEPGM bit.
This read-only bit is set when the PEPROM bit select register selects the first row (row zero) of the
PEPROM array. Selecting any other row clears PEPRZF. Monitoring PEPRZF can reduce the code
needed to access one byte of eight PEPROM locations. Reset clears the PEPROM bit select register,
thereby setting the PEPRZF bit by default.
http://www.freescale.com
1 = Programming voltage applied to array bit
0 = Programming voltage not applied to array bit
1 = Row zero selected
0 = Row zero not selected
PP
pin. This sequence shows how to program each PEPROM bit:
While the PEPGM bit is set and the V
IRQ/V
To program the PEPROM bits properly, the V
than 4.5 Vdc.
MC68HC705JJ7 • MC68HC705JP7 Advance Information Data Sheet, Rev. 4.1
PP
pin, do not access bits that are to be left unprogrammed (erased).
PEBSR
$00
$01
$07
$08
$09
$37
$38
$39
$3E
$3F
Table 12-1. PEPROM Bit Selection
V
V
V
|
|
|
EPGM
.
NOTE
Row 0
Row 1
Row 7
Row 0
Row 1
Row 7
Row 0
Row 1
Row 6
Row 7
V
V
V
PEPROM Bit Selected
|
|
|
PP
voltage level is applied to the
DD
voltage must be greater
Column 0
Column 0
Column 0
Column 1
Column 1
Column 6
Column 7
Column 7
Column 7
Column 7
V
V
V
PP
|
|
|
voltage level applied to the
PEPROM Programming
PP
pin to
117