MC68HC12 MOTOROLA [Motorola, Inc], MC68HC12 Datasheet - Page 94
MC68HC12
Manufacturer Part Number
MC68HC12
Description
The MC68HC912DT128A microcontroller unit (MCU) is a 16-bit device composed of standard on-chip peripherals including a 16-bit central processing unit
Manufacturer
MOTOROLA [Motorola, Inc]
Datasheet
1.MC68HC12.pdf
(478 pages)
- Current page: 94 of 478
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PORTK — Port K Data Register
Resource Mapping
6.4.3 Test mode Program space expansion
6.4.4 Page Index register descriptions
Technical Data
94
(PPAGE bit 2)
Emulation
Page Index 2
RESET:
PORT
0
0
1
1
Bit 7
ECS
PK7
-
(PPAGE bit 1)
Page Index 1
0
1
0
1
Table 6-4. Test mode program space Page Index
6
0
0
0
In special mode and for test purposes only, the 128K bytes of Flash
EEPROM for MC68HC912DT128A can be accessed through a test
program space window of 32K bytes. This window replaces the user’s
program space window to be able to access an entire array. In special
mode and with ROMTST bit set in MISC register, a program space is
located from $8000 to $FFFF. Only two page indices are used to point
to one of the four 32K byte arrays. These indices can be viewed as
expanded addresses X16 and X15.
Read and write anytime
Writes do not change pin state when pin configured for page index
emulation output.
This port is associated with page index emulation pins. When the port is
not enabled to emulate page index, the port pins are used as general-
purpose I/O. Port K bit 3 is used as a general purpose I/O pin only. This
register is not in the map in peripheral or expanded modes while the
EMK control bit in MODE register is set.
(PPAGE bit 0)
Page Index 0
5
0
0
0
X
X
X
X
Resource Mapping
4
0
0
0
Flash register space Page
32K byte array Page 0
32K byte array Page 1
32K byte array Page 2
32K byte array Page 3
PK3
3
-
-
PIX2
PK2
2
-
MC68HC912DT128A — Rev 4.0
PIX1
PK1
1
-
Flash array
00FEE32K
01FEE32K
10FEE32K
11FEE32K
PIX0
Bit 0
PK0
-
MOTOROLA
$00FC
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