mc68hc912dg128 Freescale Semiconductor, Inc, mc68hc912dg128 Datasheet - Page 87

• Manufacturer Part Number: mc68hc912dg128
• Description: M68hc12 Microcontrollers
• Manufacturer: Freescale Semiconductor, Inc

PORTK — Port K Data Register
5.5.7 Test mode Program space expansion
5.5.8 Page Index register descriptions
MC68HC912DG128 — Rev 3.0
MOTOROLA
Emulation
RESET:
PORT
(PPAGE bit 2)
Page Index 2
0
0
1
1
ECS
Bit 7
PK7
-
(PPAGE bit 1)
Page Index 1
Table 5-5. Test mode program space Page Index
6
0
0
0
In special mode and for test purposes only, the 128K bytes of Flash
EEPROM 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.
They can be viewed as expanded addresses X16 and X15.
Read and write anytime
Writing to the port does not change the pin states when it is configured
for page index emulation output.
This port is associated with the 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 always a general purpose I/O pin.
This register is not in the memory map in peripheral or expanded modes
when the EMK control bit in MODE register is set.
0
1
0
1
Freescale Semiconductor, Inc.
For More Information On This Product,
5
0
0
0
(PPAGE bit 0)
Page Index 0
Go to: www.freescale.com
X
X
X
X
Operating Modes
4
0
0
0
Flash register space Page
PK3
32K byte array Page 0
32K byte array Page 1
32K byte array Page 2
32K byte array Page 3
3
-
-
PIX2
PK2
2
-
PIX1
PK1
1
-
Internal Resource Mapping
Flash array
00FEE32K
01FEE32K
10FEE32K
11FEE32K
PIX0
Bit 0
PK0
Operating Modes
-
Technical Data
$00FC
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