89E516RD View Datasheet(PDF) - Microchip Technology

Part Name

Description

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89E516RD

FlashFlex MCU / SST89E516RD

Microchip Technology 

FlashFlex MCU

SST89E516RD2 / SST89E516RD

SST89V516RD2 / SST89V516RD

Data Sheet

Dual Data Pointers

The device has two 16-bit data pointers. The DPTR Select (DPS) bit in AUXR1 determines which of

the two data pointers is accessed. When DPS=0, DPTR0 is selected; when DPS=1, DPTR1 is

selected. Quickly switching between the two data pointers can be accomplished by a single INC

instruction on AUXR1. (See Figure 8)

AUXR1 / bit0

DPS

DPTR1

DPS = 0 → DPTR0

DPS = 1 → DPTR1

DPH

83H

DPTR0

DPL

82H

Figure 8: Dual Data Pointer Organization

External Data Memory

1273 F03.0

Special Function Registers

Most of the unique features of the FlashFlex microcontroller family are controlled by bits in special

function registers (SFRs) located in the SFR memory map shown in Table 5. Individual descriptions of

each SFR are provided and reset values indicated in Tables 6 to 10.

Table 5: FlashFlex SFR Memory Map

F8H

F0H

E8H

E0H

D8H

D0H

C8H

C0H

B8H

B0H

A8H

A0H

98H

90H

88H

80H

IP11

B1

IEA1

ACC1

CCON1

PSW1

T2CON1

WDTC1

IP1

P31

IE1

P21

SCON1

P11

TCON1

P01

CH

CL

CMOD

T2MOD

SADEN

SFCF

SADDR

SBUF

TMOD

SP

8 BYTES

CCAP0H CCAP1H CCAP2H CCAP3H CCAP4H

CCAP0L CCAP1L CCAP2L CCAP3L CCAP4L

CCAPM0 CCAPM1 CCAPM2 CCAPM3 CCAPM4

SPCR

RCAP2L RCAP2H TL2

TH2

SFCM

SPSR

AUXR1

SFAL

SFAH

SFDT

P4

SFST

XICON

TL0

TL1

TH0

TH1

AUXR

DPL

DPH

WDTD SPDR

IP1H

IPH

PCON

1. Bit addressable SFRs

FFH

F7H

EFH

E7H

DFH

D7H

CFH

C7H

BFH

B7H

AFH

A7H

9FH

97H

8FH

87H

T0-0.0 25093

©2013 Silicon Storage Technology, Inc.

16

DS25093B

02/13

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