SAB88C166 Datasheet, PDF (10/58 Pages) Siemens Semiconductor Group – 16-Bit CMOS Single-Chip Microcontrollers with/without oscillator prescaler with 32 KByte Flash EPROM

3’FFFF_H
3
3’0000_H
2
2’0000_H
1
1’0000_H
0
0’0000_H
Memory Segments
Figure 3
Flash Memory Overview
SAB 88C166(W)
Bank 3
Bank 2
x’7800_H
x’6000_H
Bank 1
x’3000_H
Bank 0
Flash Banks
x’0000_H
The Flash Control Register (FCR)
In standard operation mode the Flash memory can be accessed like the normal mask-
programmable on-chip ROM of the SAB 83C166. So all appropriate direct and indirect addressing
modes can be used for reading the Flash memory.
All programming or erase operations of the Flash memory are controlled via the 16-bit Flash control
register FCR. To prevent unintentional writing to the Flash memory the FCR is locked and inactive
during standard operation mode. Before a valid access to the FCR is enabled, the Flash memory
writing mode must be entered. This is done via a special key code instruction sequence.
Semiconductor Group
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