MC68HC711G5 MOTOROLA [Motorola, Inc], MC68HC711G5 Datasheet - Page 26
MC68HC711G5
Manufacturer Part Number
MC68HC711G5
Description
High-density Complementary Metal Oxide Semiconductor (HCMOS) Microcontroller
Manufacturer
MOTOROLA [Motorola, Inc]
Datasheet
1.MC68HC711G5.pdf
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2.2.9
During reset, MODA and MODB are used to select one of the four basic operating modes. Refer to
Table 2-1 for mode selection and to paragraph 2.1: OPERATING MODES for additional details.
After the operating mode has been selected, the open drain LIR pin goes to an active low level during
the first E-clock cycle of each instruction. The LIR pin can be used as an aid to program debugging.
The V kam signal is used as the input for RAM standby power and will retain the RAM contents during
power down.
2.2.10 A/D Converter Reference Voltages (V
These two pins provide the reference high and low voltages to the internal Analog-to-Digital
converter circuitry. Refer to SECTION 9: ANALOG-TO-DIGITAL CONVERTER.
2.2.11 Port Signals
The 66 input/output (I/O) lines are arranged into seven 8-bit ports (ports A, B, C, E, F, G and H), one
6-bit port (Port D) and one 4-bit port (Port J). Most of these ports serve more than one purpose,
depending on the operating mode or peripheral functions selected. Table 2-3 shows the different
functions of each port pin in the four operating modes. For more detailed information on I/O ports
refer to Section 4: INPUT/OUTPUT PORTS.
MOTOROLA
2-8
Mode A/Load Instruction Register (MODA/LIR) and Mode B/Standby Voltage
(MODB/V
kam
)
OPERATING MODES AND SIGNAL DESCRIPTION
rl
, V
rh
)
MC68HC11G5
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