Datasheet

Resource Mapping
MC9S12DP256 — Revision 1.1
Resource Mapping
Bit 5 – Bit 0 — Port K bits 5 – 0.
These six bits are used to determine which array page is being
accessed. They can be viewed as expanded addresses XAB19 –
XAB15 and XAB14 of the 20-bit address used to access the 256K
byte Flash EEPROM array. The decoding is done internally based
upon the regular address bus bits 15 and 14 (AB[15:14]) and the state
of the ROMHM bit in the MISC register. The decoding is performed
regardless of the state of the ROMON bit in the MISC register.
Alternatively, these bits can be used for general purpose I/O
depending upon the state of the EMK bit in the MODE register.
Table 18 Expanded address decode
A15 A14 ROMHM ECS XAB19 XAB18 XAB17 XAB16 XAB15 XAB14
0 0 X 1 PIX5 PIX4 PIX3 PIX2 PIX1 PIX0
0100111110
0 1 1 1 PIX5 PIX4 PIX3 PIX2 PIX1 PIX0
1 0 X 0 PIX5 PIX4 PIX3 PIX2 PIX1 PIX0
11X0111111
Freescale Semiconductor, I
Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
nc...