MC9S12T64 Datasheet, PDF (132/608 Pages) Motorola, Inc – Specification

Freescale Semiconductor, Inc.
Module Mapping Control (MMC)
Program Page
Index Register
(PPAGE)
This register determines the 16KB active page viewed through the
Program Page Window from $8000 – $BFFF. CALL and RTC
instructions have a special single wire mechanism to read and write this
register without using the address bus.
Read: anytime.
Write: Not writable in Normal and Emulation modes. Write anytime in
Special modes.
Reset to $3C (Flash EEPROM Page $3C located from $8000 to
$BFFF)
Address Offset: $0030
Bit 7
6
5
4
3
2
1
Bit 0
Read: 0
0
PIX5
PIX4
PIX3
PIX2
PIX1
PIX0
Write:
Reset: 0
0
1
1
1
1
0
0
= Reserved
PIX5 – PIX0 — Program Page Index Bits 5-0
These six page index bits are used to select which of the 64 Flash
EEPROM array pages is to be accessed in the Program Page
Window. The 64KB address space of MC9S12T64 is divided in the
four 16KB pages with their correspondent PPAGE values listed in
Table 25.
CAUTION:
Proper functionality of the MCU is not guaranteed when PPAGE values
other than the ones specified at Table 25,are used. Proper operation in
Normal modes is not guaranteed if PPAGE values other than $3C are
used.
NOTE: Normal writes to this register take one cycle to go into effect. Writes to
this register using the special single wire mechanism of the CALL and
MC9S12T64Revision 1.1.1
Module Mapping Control (MMC)
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