MC9S12XD256MAL Datasheet, PDF (1148/1348 Pages) Freescale Semiconductor, Inc – Freescale’s Scalable Controller Area Network

Chapter 28 256 Kbyte Flash Module (S12XFTX256K2V1)
• Security feature to prevent unauthorized access to the Flash memory
• Code integrity check using built-in data compression
28.1.3 Modes of Operation
Program, erase, erase verify, and data compress operations (please refer to Section 28.4.1, “Flash
Command Operations” for details).
28.1.4 Block Diagram
A block diagram of the Flash module is shown in Figure 28-1.
Command
Interrupt
Request
FTX256K2
Flash
Interface
Command Pipeline
cmd2
addr2
data2_0
data2_1
cmd1
addr1
data1_0
data1_1
Registers
Protection
Security
Flash Block 0
64K * 16 Bits
sector 0
sector 1
sector 127
Flash Block 1
64K * 16 Bits
sector 0
sector 1
sector 127
Oscillator
Clock
Clock
Divider _FCLK
Figure 28-1. FTX256K2 Block Diagram
28.2 External Signal Description
The Flash module contains no signals that connect off-chip.
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MC9S12XDP512 Data Sheet, Rev. 2.21
Freescale Semiconductor