CORE8051-AR【PDF 10/41 页】IP MODULE CORE8051

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Core8051

in the lower 128 bytes are accessible through direct or

indirect addressing.

The internal data memory is not instantiated in Core8051.

The user may use internal memory resources if the

ProASIC PLUS or Axcelerator families are used. The SX-A

Special Function Registers

Internal Special Function Registers

A map of the internal Special Function Registers is shown

in Table 7 . Only a few addresses are occupied; the others

are not implemented. Read access to unimplemented

Table 7 ? Internal Special Function Register Memory Map

Bin

and RTSXS-S families have no internal memory resources,

thus the user would need to either create and instantiate

a distributed RAM (comprised of FPGA combinatorial and

sequential cells) or use an external memory device.

addresses will return undefined data, while write access

will have no effect.

Hex

F8

F0

E8

E0

D8

D0

C8

C0

B8

B0

A8

A0

98

90

88

80

X000

–

b

–

acc

–

psw

–

–

ien1

p3

ien0

p2

scon

p1

tcon

p0

X001

–

–

–

–

–

–

–

–

ip1

–

ip0

–

sbuf

–

tmod

sp

X010

–

–

–

–

–

–

–

–

–

–

–

–

–

dps

tl0

dpl

X011

–

–

–

–

–

–

–

–

–

–

–

–

–

–

tl1

dph

X100

–

–

–

–

–

–

–

–

–

–

–

–

–

–

th0

dpl1

X101

–

–

–

–

–

–

–

–

–

–

–

–

–

–

th1

dph1

X110

–

–

–

–

–

–

–

–

–

–

–

–

–

–

ckcon

–

X111

–

–

–

–

–

–

–

–

–

–

–

–

–

–

–

pcon

Hex

FF

F7

EF

E7

DF

D7

CF

C7

BF

B7

AF

A7

9F

97

8F

87

The reset value for of each of the predefined special function registers is listed in Table 8 .

Table 8 ? Special Function Register Reset Values

Register

p0

sp

dpl

dph

dpl1

10

Location

80h

81h

82h

83h

84h

Reset value

FFh

07h

00h

00h

00h

Description

Port 0

Stack Pointer

Data Pointer Low 0

Data Pointer High 0

Dual Data Pointer Low 1

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CORE8051-UR 制造商:ACTEL 制造商全称:Actel Corporation 功能描述:Core8051

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