MCHC705JJ7CPE Freescale Semiconductor, MCHC705JJ7CPE Datasheet - Page 34
![IC MCU 8BIT 224 BYTES RAM 20PDIP](/photos/38/0/380057/pdip20_sml.jpg)
MCHC705JJ7CPE
Manufacturer Part Number
MCHC705JJ7CPE
Description
IC MCU 8BIT 224 BYTES RAM 20PDIP
Manufacturer
Freescale Semiconductor
Series
HC05r
Datasheet
1.MC705JJ7CDWE.pdf
(164 pages)
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
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Interrupts
4.3 Interrupt Processing
To begin servicing an interrupt, the CPU does these actions:
The return-from-interrupt (RTI) instruction causes the CPU to recover its register contents from the stack
as shown in
Figure
34
•
•
•
Stores the CPU registers on the stack in the order shown in
Sets the I bit in the condition code register to prevent further interrupts
Loads the program counter with the contents of the appropriate interrupt vector locations as shown
in
4-2.
Table 4-1
Figure
MC68HC705JJ7 • MC68HC705JP7 Advance Information Data Sheet, Rev. 4.1
4-1. The sequence of events caused by an interrupt is shown in the flowchart in
$00BE
$00FD
$00BF
$00C0
$00C1
$00C2
$00FE
$00FF
$0020
$0021
n+1
n+2
n+3
n+4
n
Figure 4-1. Interrupt Stacking Order
Program Counter (High Byte)
Program Counter (Low Byte)
Condition Code Register
Top of Stack (RAM)
Bottom of Stack
Bottom of RAM
Index Register
Accumulator
Stacking
Order
Figure 4-1
5
4
3
2
1
›
Unstacking
Order
?
1
2
3
4
5
Freescale Semiconductor
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