MC68HC711D3VFNE2 Freescale Semiconductor, MC68HC711D3VFNE2 Datasheet - Page 16

• Manufacturer Part Number: MC68HC711D3VFNE2
• Description: IC MCU 8BIT 4K FLASH 44-PLCC
• Manufacturer: Freescale Semiconductor
• Series: HC11r

Specifications of MC68HC711D3VFNE2

• Core Processor: HC11
• Core Size: 8-Bit
• Speed: 2MHz
• Connectivity: SCI, SPI
• Peripherals: POR, WDT
• Number Of I /o: 26
• Program Memory Size: 4KB (4K x 8)
• Program Memory Type: OTP
• Ram Size: 192 x 8
• Voltage - Supply (vcc/vdd): 4.5 V ~ 5.5 V
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 105°C
• Package / Case: 44-PLCC
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Data Converters: -

2.4 E-Clock Output (E)
2.5 Interrupt Request (IRQ)
2.6 Non-Maskable Interrupt (XIRQ)
2-4
*
FIRST
MCU
THIS VALUE INCLUDES ALL STRAY CAPACITANCES.
E is the output connection for the internally generated E clock. The signal from E is
used as a timing reference. The frequency of the E-clock output is one fourth that of
the input frequency at the XTAL and EXTAL pins. When E-clock output is low, an in-
ternal process is taking place. When it is high, data is being accessed. All clocks, in-
cluding the E clock, are halted when the MCU is in STOP mode. The E clock can be
turned off in single-chip modes to reduce the effects of radio frequency interference
(RFI).
The IRQ input provides a means of applying asynchronous interrupt requests to the
MCU. Either negative edge-sensitive triggering or level-sensitive triggering is program
selectable (OPTION register). IRQ is always configured to level-sensitive triggering at
reset. Connect an external pullup resistor, typically 4.7 k , to V
in a level sensitive wired-OR configuration.
The XIRQ input provides a means of requesting a nonmaskable interrupt after reset
initialization. During reset, the X bit in the condition code register (CCR) is set and any
interrupt is masked until MCU software enables it. Because the XIRQ input is level-
EXTAL
XTAL
MCU
Figure 2-5 External Oscillator Connections
Figure 2-6 One Crystal Driving Two MCUs
EXTAL
10 M
XTAL
Freescale Semiconductor, Inc.
For More Information On This Product,
NC
Go to: www.freescale.com
CRYSTAL
4 x E
PIN DESCRIPTIONS
25 pF
25 pF
EXTERNAL OSCILLATOR
*
*
CMOS-COMPATIBLE
4 x E
EXT EXTAL CONN
220
DD
when IRQ is used
NC
TECHNICAL DATA
DUAL-MCU XTAL CONN
EXTAL
XTAL
SECOND
MCU