參數(shù)資料
型號(hào)： μPD789025
廠商： NEC Corp.
英文描述： 8 Bit Single Chip Microcontrollers(8位單片微控制器)
中文描述： 8位單片機(jī)微控制器（8位單片微控制器）
文件頁(yè)數(shù)： 23/52頁(yè)
文件大小： 275K
代理商： ΜPD789025
23
μ
PD789022, 789024, 789025, 789026
9. INSTRUCTION SET OVERVIEW
The instruction set for the
μ
PD789022,
μ
PD789024,
μ
PD789025, and
μ
PD789026 is listed later.
9.1
Legend
9.1.1
Operand formats and descriptions
The description made in the operand field of each instruction conforms to the operand format for the instructions
listed below (the details conform with the assembly specification). If more than one operand format is listed for an
instruction, one is selected. Uppercase letters, #, !, $, and a pair of [ and ] are used to specify keywords, which must
be written exactly as they appear. The meanings of these special characters are as follows:
#: Immediate data specification
$: Relative address specification
!: Absolute address specification
[ and ]: Indirect address specification
Immediate data should be described using appropriate values or labels. The specification of values and labels
must be accompanied by #, !, $, or a pair of [ and ].
Operand registers, expressed as r or rp in the formats, can be described using both functional names (X, A, C,
etc.) and absolute names (R0, R1, R2, and other names listed in Table 9-1).
Table 9-1. Operand Formats and Descriptions
Format
Description
r
rp
sfr
X (R0), A (R1), C (R2), B (R3), E (R4), D (R5), L (R6), H (R7)
AX (RP0), BC (RP1), DE (RP2), HL (RP3)
Special function register symbol
saddr
saddrp
FE20H to FF1FH: Immediate data or label
FE20H to FF1FH: Immediate data or label (even addresses only)
addr16
addr5
0000H to FFFFH: Immediate data or label
(only even address for 16-bit data transfer instructions)
0040H to 007FH: Immediate data or label (even addresses only)
word
byte
bit
16-bit immediate data or label
8-bit immediate data or label
3-bit immediate data or label
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