MC68HC11E0CFNE3 Freescale Semiconductor, MC68HC11E0CFNE3 Datasheet - Page 40

• Manufacturer Part Number: MC68HC11E0CFNE3
• Description: IC MCU 8BIT 3MHZ 52-PLCC
• Manufacturer: Freescale Semiconductor
• Series: HC11r

Specifications of MC68HC11E0CFNE3

• Core Processor: HC11
• Core Size: 8-Bit
• Speed: 3MHz
• Connectivity: SCI, SPI
• Peripherals: POR, WDT
• Number Of I /o: 38
• Program Memory Type: ROMless
• 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
• Controller Family/series: 68HC11
• No. Of I/o's: 38
• Ram Memory Size: 512Byte
• Cpu Speed: 3MHz
• No. Of Timers: 1
• Embedded Interface Type: SCI, SPI
• Digital Ic Case Style: LCC
• Rohs Compliant: Yes
• Processor Series: HC11E
• Core: HC11
• Data Bus Width: 8 bit
• Data Ram Size: 512 B
• Interface Type: SCI, SPI
• Maximum Clock Frequency: 3 MHz
• Number Of Programmable I/os: 38
• Number Of Timers: 8
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Minimum Operating Temperature: - 40 C
• On-chip Adc: 8 bit, 8 Channel
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Program Memory Size: -
• Lead Free Status / Rohs Status: Details

4.2.1 Priority and Mode Select Register
4-6
In the second method, the MODB/V
backup or from a second power supply, as shown in Figure 4-3. Using the MODB/
V
amount of external circuitry is operating from V
contents, reset must be held low whenever V
to SECTION 5 RESETS AND INTERRUPTS.
The four operating modes are selected with the logic states of the mode A (MODA)
and mode B (MODB) pins during reset. The MODA and MODB logic levels determine
the logic state of the special mode (SMOD) and mode A (MDA) control bits in the
HPRIO register.
After reset is released, the mode select pins no longer influence the MCU operating
mode. For single-chip mode, the MODA pin is connected to a logic zero. For expanded
mode, MODA is normally connected to V
MODA pin also functions as the load instruction register (LIR) pin when the MCU is not
in reset. The open drain active low LIR output pin drives low during the first E cycle of
each instruction. The MODB pin also functions as standby power input, V
maintains RAM contents in the absence of V
about hardware mode selection.
STBY
MODB
1
1
0
0
pin may require external hardware, but can be justified when a significant
4.8 V
NiCd
Figure 4-3 RAM Standby MODB/V
Inputs
V
DD
+
Table 4-2 Hardware Mode Select Summary
Freescale Semiconductor, Inc.
OPERATING MODES AND ON-CHIP MEMORY
MODA
V
V
For More Information On This Product,
DD
BATT
0
1
0
1
MAX
690
V
OUT
Go to: www.freescale.com
Expanded Multiplexed
Special Bootstrap
4.7k
STBY
Special Test
Single-Chip
Mode
DD
pin can supply RAM power from a battery
DD
through a pull-up resistor of 4.7 k
TO MODB/V
OF M68HC11
DD
DD
is below normal operating level. Refer
. Refer to Table 4-2 for information
STBY
. If V
RBOOT
STBY
STBY
Connections
0
0
1
0
is used to maintain RAM
Latched at Reset
SMOD
MODB/VSTBY CONN
0
0
1
1
TECHNICAL DATA
MDA
0
1
0
1
STBY,
which
The