MCHC705JJ7CPE Freescale Semiconductor, MCHC705JJ7CPE Datasheet - Page 50

• 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

Operating Modes
IRQF — External Interrupt Request Flag
IRQR — Interrupt Request Reset Bit
6.3 Low-Power Modes
Four modes of operation reduce power consumption:
Figure 6-2
50
The IRQF flag is a clearable, read-only bit that is set when an external interrupt request is pending.
Refer to
This write-only bit clears the IRQF flag bit and prevents redundant execution of interrupt routines. Refer
to
•
•
•
•
Chapter 4 Interrupts
Stop mode
Wait mode
Halt mode
Data-retention mode
shows the sequence of events in stop, wait, and halt modes.
Chapter 4 Interrupts
When switching from LPO to EPO, the user must be careful to ensure that
the EPO has been enabled and powered up long enough to stabilize before
shifting clock sources.
OM2
0
0
1
1
MC68HC705JJ7 • MC68HC705JP7 Advance Information Data Sheet, Rev. 4.1
OM1
0
1
0
1
for more details.
Oscillator
Selected
External
Internal
Internal
Internal
for more details.
Table 6-1. Oscillator Selection
Low-Power
Oscillator
Disabled
Internal
Enabled
Enabled
Enabled
(LPO)
NOTE
.
External Pin
Oscillator
Disabled
Disabled
Enabled
Enabled
(EPO)
Consumption
Normal
Normal
Lowest
Lowest
Power
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