MC68HC705SR3CP Freescale Semiconductor, MC68HC705SR3CP Datasheet - Page 31

• Manufacturer Part Number: MC68HC705SR3CP
• Description: IC MCU 3.75K 2.1MHZ OTP 40-DIP
• Manufacturer: Freescale Semiconductor
• Series: HC05r

Specifications of MC68HC705SR3CP

• Core Processor: HC05
• Core Size: 8-Bit
• Speed: 4MHz
• Peripherals: LED, POR
• Number Of I /o: 32
• Program Memory Size: 3.75KB (3.75K x 8)
• Program Memory Type: OTP
• Ram Size: 192 x 8
• Voltage - Supply (vcc/vdd): 3 V ~ 5.5 V
• Data Converters: A/D 4x8b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 40-DIP (0.600", 15.24mm)
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Eeprom Size: -
• Connectivity: -

3.6
Ports B, C, and D have 20KΩ pull-up resistors, which can be connected or disconnected, by
setting appropriate bits in the Port Option Register (at $0A).
3.6.1
PIL — PB5:PB7 current drive select
PDP — Port D Pull-up
MC68HC05SR3
Port Option Register (POPR)
1 (set)
0 (clear) –
1 (set)
0 (clear) –
Programmable Pull-Up Devices
Port Option Register
–
–
PB5-PB7 are configured to 2mA drive port.
PB5-PB7 are configured to 10mA drive port.
The internal 20KΩ pull-up resistors are connected to the inputs of
Port D.
No pull-up resistor is connected to the inputs of Port D.
Figure 3-5 Typical I
Address bit 7
$0A
–1
–2
–3
–4
–5
0
INPUT/OUTPUT PORTS
0
worst case
best case
PB5-PB7 in low current mode
worst case
typical
typical
best case
bit 6
1
OL
V
OH
bit 5
PIL
vs V
(volts)
OL
All ports
bit 4
PDP
2
@V
DD
bit 3
PCP
=3V
3
bit 2
PBP
bit 1
PB1
bit 0
PB0
Freescale
0000 0000
on reset
State
TPG
3-5
3