MC68HC705JP7CDW Freescale Semiconductor, MC68HC705JP7CDW Datasheet - Page 69

• Manufacturer Part Number: MC68HC705JP7CDW
• Description: IC MCU 8BIT 28-SOIC
• Manufacturer: Freescale Semiconductor
• Series: HC05r

Specifications of MC68HC705JP7CDW

• Core Processor: HC05
• Core Size: 8-Bit
• Speed: 2.1MHz
• Connectivity: SIO
• Peripherals: POR, Temp Sensor, WDT
• Number Of I /o: 22
• 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: 28-SOIC (7.5mm Width)
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Eeprom Size: -

7.5 Port Transitions
Glitches and temporary floating inputs can occur if the control bits regarding each port I/O pin are not
performed in the correct sequence.
Freescale Semiconductor
1. DDRC can always be read or written.
2. Don’t care
Port C
Pin(s)
PC0
PC1
PC2
PC3
PC4
PC5
PC6
PC7
•
•
•
•
•
Do not use read-modify-write instructions on pulldown register A or B.
Avoid glitches on port pins by writing to the port data register before changing data direction
register bits from a logic 0 to a logic 1.
Avoid a floating port input by clearing its pulldown register bit before changing its data direction
register bit from a logic 1 to a logic 0.
The SWPDI bit in the MOR turns off all port pulldown devices and disables software control of the
pulldown devices. Reset has no effect on the pulldown devices when the SWPDI bit is set.
Two or more output pins of the same port can be connected electrically to provide output currents
up to the sum of the maximum specified drive currents as defined in
Characteristics (5.0 Vdc)
ensure that all ganged pins always maintain the same output logic value.
in MOR
SWPDI
X
X
0
0
1
0
0
1
(2)
(2)
MC68HC705JJ7 • MC68HC705JP7 Advance Information Data Sheet, Rev. 4.1
Table 7-4. Port C Pin Functions (28-Pin Versions Only)
PDICH
X
X
X
X
X
0
1
X
Control Bits
(2)
(2)
(2)
(2)
and
PDICL
X
X
X
X
X
X
Port C
0
1
(2)
(2)
(2)
(2)
(2)
(2)
15.8 DC Electrical Characteristics (3.0
DDRCx
0
0
0
1
0
0
0
1
(1)
(Pin or Data Register)
Read
Data
Data
Pin
Pin
Pin
Pin
Pin
Pin
PORTC Access
Write
Data
Data
Data
Data
Data
Data
Data
Data
15.7 DC Electrical
Vdc). Care must be taken to
Pulldown
On
Off
Off
Off
Off
Off
Off
On
Port C Pins
Result on
Port Transitions
PCx out
PCx out
PCx in
PCx in
PCx in
PCx in
PCx in
PCx in
Pin
69