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Freescale Semiconductor Demonstration Board for Freescale MC9S12XHY256 Microcontroller DEMO9S12XHY256 DEMO9S12XHY256 用户手册

产品代码
DEMO9S12XHY256
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页码 共 924
256 KByte Flash Module (S12XFTMR256K1V1)
MC9S12XHY-Family Reference Manual, Rev. 1.04
Freescale Semiconductor
569
18.1.2.3
Other Flash Module Features
•
No external high-voltage power supply required for Flash memory program and erase operations
•
Interrupt generation on Flash command completion and Flash error detection
•
Security mechanism to prevent unauthorized access to the Flash memory
18.1.3
Block Diagram
The block diagram of the Flash module is shown in
.
Figure 18-1. FTMR256K1 Block Diagram
Oscillator
Clock
Divider
Clock (XTAL)
Command
Interrupt
Request
FCLK
Protection
Security
Registers
Flash
Interface
P-Flash
32Kx72
sector 0
sector 1
sector 127
sector 0
sector 1
sector 127
16bit
internal
bus
16Kx72
16Kx72
Error
Interrupt
Request
CPU
Memory
Controller
D-Flash
4Kx22
sector 0
sector 1
sector 31
Scratch RAM
384x16