MC68HC711E9CFN3 Freescale Semiconductor, MC68HC711E9CFN3 Datasheet - Page 23

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MC68HC711E9CFN3

Manufacturer Part Number
MC68HC711E9CFN3
Description
IC MCU 3MHZ 12K OTP 52-PLCC
Manufacturer
Freescale Semiconductor
Series
HC11r
Datasheets

Specifications of MC68HC711E9CFN3

Core Processor
HC11
Core Size
8-Bit
Speed
3MHz
Connectivity
SCI, SPI
Peripherals
POR, WDT
Number Of I /o
38
Program Memory Size
12KB (12K x 8)
Program Memory Type
OTP
Eeprom Size
512 x 8
Ram Size
512 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
52-PLCC
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant

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1.4.4 E-Clock Output (E)
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 internal process is taking place. When it is high, data is being
accessed.
All clocks, including the E clock, are halted when the MCU is in stop mode. To reduce RFI emissions, the
E-clock output of most E-series devices can be disabled while operating in single-chip modes.
The E-clock signal is always enabled on the MC68HC811E2.
1.4.5 Interrupt Request (IRQ)
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. When using IRQ in a level-sensitive wired-OR
configuration, connect an external pullup resistor, typically 4.7 kΩ, to V
1.4.6 Non-Maskable Interrupt (XIRQ/V
The XIRQ input provides a means of requesting a non-maskable 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-sensitive, it can be connected to a multiple-source wired-OR
network with an external pullup resistor to V
Whenever XIRQ or IRQ is used with multiple interrupt sources each source must drive the interrupt input
with an open-drain type of driver to avoid contention between outputs.
Freescale Semiconductor
Figure 1-9. Common Parallel Resonant Crystal Connections
MCU
Figure 1-10. External Oscillator Connections
MCU
EXTAL
XTAL
EXTAL
XTAL
M68HC11E Family Data Sheet, Rev. 5.1
NC
DD
PPE
. XIRQ is often used as a power loss detect interrupt.
10 MΩ
)
EXTERNAL OSCILLATOR
CRYSTAL
CMOS-COMPATIBLE
4 x E
4 x E
C
C
L
L
DD
.
Pin Descriptions
23

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