S912XHY128F0VLM Datasheet, PDF (571/802 Pages) Freescale Semiconductor, Inc – S12 Microcontrollers

256 KByte Flash Module (S12XFTMR256K1V1)
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.
Command
Interrupt
Request
Error
Interrupt
Request
Flash
Interface
Registers
Protection
Security
16bit
internal
bus
P-Flash
32Kx72
16Kx72 16Kx72
sector 0
sector 0
sector 1
sector 1
sector 127
sector 127
Oscillator
Clock (XTAL)
Clock
Divider _FCLK
Memory
Controller
CPU
Scratch RAM
384x16
D-Flash
4Kx22
sector 0
sector 1
sector 31
Figure 18-1. FTMR256K1 Block Diagram
MC9S12XHY-Family Reference Manual, Rev. 1.01
Freescale Semiconductor
571