Zilog Z8F0130 Manual do Utilizador descarregar pdf (Página 236)

eZ8

™

CPU Core

User Manual

UM012820-0810 SBCX Instruction

221

Attributes

Escaped Mode Addressing

Using Escaped Mode Addressing, address mode ER for the source or des-

tination specifies a working register with 4-bit addressing.

If the high byte of the source or destination address is EEh (11101110b),

a working register is inferred. For example, the operand

EE3h selects

Working Register R3. The full 12-bit address is provided by

{RP[3:0],

RP[7:4], 3h}

To access registers on Page Eh (addresses E00h to EFFh), set the Page

Pointer, RP[3:0], to

Eh and set the Working Group Pointer, RP[7:4], to

the preferred Working Group.

Sample Usage

If Register 346h contains the value 2Eh, the Carry flag is set, and Regis-

ter 129h contains the value 1bh, the following statement leaves the value

12h in Register 346h, sets the D flag, and clears the C, Z, S, V, and H

flags:

SBCX

346h

, 129h



Object Code: 38 12 93 46

If Register C6Ch contains the value 2Ah and the Carry flag is not set, the

following statement leaves the value

27h in Register C6Ch, sets the. D

flag, and clears the C, Z, S, V, and H flags:

SBCX

C6Ch

, #03h



Object Code: 39 03 0C 6C

Mnemonic

Destination,

Source

Op Code

(Hex) Operand 1 Operand 2 Operand 3

SBCX ER1, ER2 38 ER2[11:4] {ER2[3:0],

ER1[11:8]}

ER1[7:0]

SBCX ER1, IM 39 IM {0h,

ER1[11:8]}

ER1[7:0]

1 2 ... 231 232 233 234 235 236 237 238 239 240 241 ... 313 314

Comentários a estes Manuais

Sem comentários

Zilog Z8F0130 Manual do Utilizador Página 236

Comentários a estes Manuais

Manuais e produtos relacionados com Sensores Zilog Z8F0130