s908gr32ag3vfa Freescale Semiconductor, Inc, s908gr32ag3vfa Datasheet - Page 29

• Manufacturer Part Number: s908gr32ag3vfa
• Description: M68hc08 Microcontrollers
• Manufacturer: Freescale Semiconductor, Inc

Chapter 2
Memory
2.1 Introduction
The CPU08 can address 64 Kbytes of memory space. The memory map, shown in
2.2 Unimplemented Memory Locations
Accessing an unimplemented location can cause an illegal address reset. In the memory map
(Figure
2.3 Reserved Memory Locations
Accessing a reserved location can have unpredictable effects on microcontroller (MCU) operation. In the
Figure 2-1
or with the letter R.
2.4 Input/Output (I/O) Section
Most of the control, status, and data registers are in the zero page area of $0000–$003F, or at
$0440–$0461. Additional I/O registers have these addresses:
Data registers are shown in
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62,078 bytes of user FLASH memory
2048 bytes of random-access memory (RAM)
52 bytes of user-defined vectors
$FE00; SIM break status register, BSR
$FE01; SIM reset status register, SRSR
$FE02; reserved
$FE03; SIM break flag control register, BFCR
$FE04; interrupt status register 1, INT1
$FE05; interrupt status register 2, INT2
$FE06; interrupt status register 3, INT3
$FE07; interrupt status register 4, INT4
$FE08; FLASH-2 control register, FL2CR
$FE09; break address register high, BRKH
$FE0A; break address register low, BRKL
$FE0B; break status and control register, BRKSCR
$FE0C; LVI status register, LVISR
$FE0D; FLASH-2 test control register, FLTCR2
$FE0E; FLASH-1 test control register, FLTCR1
$FF80; FLASH-1 block protect register, FL1BPR
$FF81; FLASH-2 block protect register, FL2BPR
$FF88; FLASH-1 control register, FL1CR
2-1) and in register figures in this document, unimplemented locations are shaded.
and in register figures in this document, reserved locations are marked with the word Reserved
MC68HC908GR60A • MC68HC908GR48A • MC68HC908GR32A Data Sheet, Rev. 5
Figure
2-2.
Table 2-1
is a list of vector locations.
Figure
2-1, includes:
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