SC9RS08KA2 datasheet(29/134 Pages) FREESCALE

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Chapter 4 Memory

SC9RS08KA2 Series Data Sheet, Rev. 1

Freescale Semiconductor

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

SECD

$0211

FLCR

HVEN

MASS

0PGM

$0212–

$0213

Reserved

—

$0214–

$021F

Unimplemented

—

$0220

PTAPE

PTAPE5

PTAPE4

PTAPE2

PTAPE1

PTAPE0

$0221

PTAPUD

PTAPUD5

PTAPUD4

PTAPUD2

PTAPUD1

PTAPUD0

$0222

PTASE

PTASE5

PTASE4

PTASE3

PTASE1

PTASE0

$0223–

$023F

Unimplemented

—

$3FF8

Reserved

—

$3FF9

Reserved

—

$3FFA2

Reserved

Reserved for Room Temperature ICS Trim

$3FFB2

Reserved

FTRIM

$3FFC

NVOPT

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

Bit 0

= Unimplemented or Reserved

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