参数资料
型号: SC9RS08KA1J3CDB
厂商: FREESCALE SEMICONDUCTOR INC
元件分类: 微控制器/微处理器
英文描述: 8-BIT, FLASH, 20 MHz, MICROCONTROLLER, PDSO6
封装: 3 X 3 MM, 0.80 MM HEIGHT, ROHS COMPLIANT, DFN-6
文件页数: 57/134页
文件大小: 3114K
代理商: SC9RS08KA1J3CDB
Chapter 4 Memory
SC9RS08KA2 Series Data Sheet, Rev. 1
Freescale Semiconductor
29
4.5
RAM
The device includes two sections of static RAM. The locations from $0000 to $000D can be directly
accessed using the more efficient tiny addressing mode instructions and short addressing mode
instructions. Location $000E RAM can either be accessed through D[X] register when register X is $0E
or through the paging window location $00CE when PAGESEL register is $00. The second section of
RAM starts from $0020 to $004F, and it can be accessed using direct addressing mode instructions.
The RAM retains data when the MCU is in low-power wait and stop mode. RAM data is unaffected by
any reset provided that the supply voltage does not drop below the minimum value for RAM retention.
4.6
Flash
The Flash memory is intended primarily for program storage. In-circuit programming allows the operating
program to be loaded into the Flash memory after final assembly of the application product. It is possible
to program the entire array through the single-wire background debug interface. Because the device does
not include on-chip charge pump circuitry, external VPP is required for program and erase operations.
4.6.1
Features
Features of the Flash memory include:
$020C–
$020F
Unimplemented
$0210
FOPT
0
SECD
$0211
FLCR
0
HVEN
MASS
0PGM
$0212–
$0213
Reserved
$0214–
$021F
Unimplemented
$0220
PTAPE
0
0
$0221
PTAPUD
0
0
$0222
PTASE
0
0
$0223–
$023F
Unimplemented
$3FF8
Reserved
$3FF9
Reserved
$3FFA2
Reserved
Reserved for Room Temperature ICS Trim
Reserved
FTRIM
$3FFC
NVOPT
0
SECD
1 Physical RAM in $000E can be accessed through D[X] register when the content of the index register X is $0E.
2 If using the MCU untrimmed, $3FFA and $3FFB may be used by applications.
Table 4-1. Register Summary (continued)
Address Register Name
Bit 7
6
5
4
3
2
1
Bit 0
= Unimplemented or Reserved
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