Siemens EF 88H Series Manual do Utilizador descarregar pdf (Página 87)

Device Specification

Semiconductor Group 7-25

Special Function Registers

All registers, except the program counter and the four general purpose register banks, reside

in the special function register area. The 81 special function registers include arithmetic

registers, pointers, and registers that provide an interface between the CPU and the on-chip

peripherals. There are also 128 directly addressable bits within the SFR area. All special

function registers are listed in table 1 and table 2.

In table 1 they are organized in numeric order of their addresses. In table 2 they are organized

in groups which refer to the functional blocks of the SAB 80C517A.

Table 2

Special Function Register

Address Register Contents

after Reset

Address Register Contents

after Reset

DPL

DPH

(WDTL)

(WDTH)

WDTREL

PCON

0FF

(00

)

(00

)

S0CON

S0BUF

IEN2

S1CON

S1BUF

S1RELL

reserved

XX00 00X0B

0X00 0000B

TCON

TMOD

TL0

TL1

TH0

TH1

reserved

COMSETL

COMSETH

COMCLRL

COMCLRH

SETMSK

CLRMSK

reserved

0FF

)

XPAGE

DPSEL

reserved

0FF

XXXXX000B

)

IEN0

IP0

S0RELL

reserved

0D9

)

Bit-addressable special function registers

X means that the value is indeterminate and the location is reserved

( )... SFRs not user accessable

1 2 ... 82 83 84 85 86 87 88 89 90 91 92 ... 136 137

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