MC68HC711P2CFN4 Freescale Semiconductor, MC68HC711P2CFN4 Datasheet - Page 33

• Manufacturer Part Number: MC68HC711P2CFN4
• Description: IC MCU 32K OTP 4MHZ 84-PLCC
• Manufacturer: Freescale Semiconductor
• Series: HC11r

Specifications of MC68HC711P2CFN4

• Core Processor: HC11
• Core Size: 8-Bit
• Speed: 4MHz
• Connectivity: MI Bus, SCI, SPI
• Peripherals: POR, PWM, WDT
• Number Of I /o: 50
• Program Memory Size: 32KB (32K x 8)
• Program Memory Type: OTP
• Eeprom Size: 640 x 8
• Ram Size: 1K x 8
• Voltage - Supply (vcc/vdd): 4.5 V ~ 5.5 V
• Data Converters: A/D 8x8b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 84-PLCC
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

2.10 MODA and MODB (MODA/LIR and MODB/VSTBY)
MC68HC11P2 — Rev 1.0
During reset, MODA and MODB select one of the four operating modes.
Refer to
After the operating mode has been selected, the LIR pin provides an
open-drain output to indicate that execution of an instruction has begun.
The LIR pin is normally configured for wired-OR operation (only pulls
low). In order to detect consecutive instructions in a high-speed
application, this signal can be made to drive high for a short time to
prevent false triggering. A series of E clock cycles occurs during
execution of each instruction. The LIR signal goes low during the first E
clock cycle of each instruction (opcode fetch). This output is provided for
assistance in program debugging and its operation is controlled by the
LIRDV bit in the OPT2 register.
The VSTBY pin is used to input RAM stand-by power. The MCU is
powered from the VDD pin unless the difference between the level of
VSTBY and VDD is greater than one MOS threshold (about 0.7 volts).
When these voltages differ by more than 0.7 volts, the internal 1024-byte
RAM and part of the reset logic are powered from VSTBY rather than
VDD. This allows RAM contents to be retained without VDD power
applied to the MCU. Reset must be driven low before V
and must remain low until V
Freescale Semiconductor, Inc.
For More Information On This Product,
Operating Modes and On-Chip
Go to: www.freescale.com
Figure 2-5. RAM stand-by connections
V
4.8 V NiCd
DD
Pin Descriptions
(+)
DD
MODA and MODB (MODA/LIR and MODB/VSTBY)
V
V
has been restored to a valid level.
DD
BATT
MAX 690
V
OUT
Memory.
4.7k¾
DD
Pin Descriptions
To MODB/VSTBY
pin of M68HC11
is removed
Technical Data