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HCS12H Datasheet(PDF) 14 Page - Freescale Semiconductor, Inc

Part # HCS12H
Description  16-bit Microcontroller
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Manufacturer  FREESCALE [Freescale Semiconductor, Inc]
Direct Link  http://www.freescale.com
Logo FREESCALE - Freescale Semiconductor, Inc

HCS12H Datasheet(HTML) 14 Page - Freescale Semiconductor, Inc

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16-bit Microcontroller HCS12H Family, Rev. 11.1
14
Freescale Semiconductor
PRELIMINARY
Pin Assignments
PE6
IPIPE1
MODB
Function 1: Port E general purpose input or output pins.
Function 2: Instruction queue tracking signals.
Function 3: The state of the MODA and MODB pins during
reset determine the initial operating mode of the MCU
PE5
IPIPE0
MODA
PE4
ECLK

Function 1: Port E general purpose input or output pin.
Function 2: Internal bus clock output that can be used as a tim-
ing reference.
PE3
FP21
LSTRB
TAGLO
Function 1: Port E general purpose input or output pin.
Function 2: LCD frontplane segment driver output pin.
Function 3: In MCU expanded modes of operation, LSTRB is
used for the low-byte strobe function to indicate the type of
bus access.
Function 4: When instruction tagging is on, TAGLO is used to
tag the low half of the instruction word being read into the
instruction queue.
PE2
FP20
R/W
Function 1: Port E general purpose input or output pin.
Function 2: LCD frontplane segment driver output pin.
Function 3: In MCU expanded modes of operations, performs
the read/write output signal for the external bus. This pin
indicates direction of data on the external bus.
PE1
IRQ

Function 1: Port E general purpose input pin.
Function 2: Maskable interrupt request input provides a
means of applying asynchronous interrupt requests. Will
wake up the MCU from STOP or WAIT mode
PE0
XIRQ

Function 1: Port E general purpose input pin.
Function 2: Nonmaskable interrupt request input provides a
means of applying asynchronous interrupt requests. Will
wake up the MCU from STOP or WAIT mode.
PH[7:0]
KWH[7:0]

Function 1: Port H general purpose input or output pins.
Function 2: Key wake-up input pins that can generate an
interrupt causing the MCU to exit STOP or WAIT mode.
PJ[3:0]
KWJ[3:0]

Function 1: Port J general purpose input or output pins.
Function 2: Key wake-up input pins that can generate an
interrupt causing the MCU to exit STOP or WAIT mode.
PK7
FP23
ECS
ROMCTL
Function 1: Port K general purpose input or output pin.
Function 2: LCD frontplane segment driver output pin.
Function 3: During MCU expanded modes of operation, this
pin is used to enable the Flash EEPROM memory in the
memory map.
Function 4: During MCU expanded modes of operation, this
pin is used as the emulation chip select signal.
PK[3:0]
BP[3:0]
XADDR[17:14]
Function 1: Port K general purpose input or output pins.
Function 2: LCD backplane segment driver output pins.
Function 3: In MCU expanded modes of operation, expanded
address pins for the external bus.
PL[7:4]
FP[31:28]
AN[15:12]
Function 1: Port L general purpose input or output pins.
Function 2: LCD frontplane segment driver output pins.
Function 3: Analog inputs (ATD).
Table 2 Pin Descriptions
Note: Features shown in bold are not available in the 9S12H256 112 pin QFP package.
Note: Features shown in Italics are only available for the “Z” versions
Pin Name
Function 1
Pin Name
Function 2
Pin Name
Function 3
Pin Name
Function 4
Description


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