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參數(shù)資料
| 型號： | UPD78322GJ-XXX-5BJ |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | 16-BIT, MROM, 16 MHz, MICROCONTROLLER, PQFP74 |
| 封裝： | 20 X 20 MM, PLASTIC, QFP-74 |
| 文件頁數(shù)： | 19/90頁 |
| 文件大小： | 649K |
| 代理商： | UPD78322GJ-XXX-5BJ |
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24
PD78320, 78322
The sixteen 8-bit registers can function as eight 16-bit register pairs (RP0 to RP7) as well.
As shown in Table 2-1, the sixteen 8-bit registers are characterized by functional names. The X register functions as
the lower half of the 16-bit accumulator, the A register functions as the upper half of the 8-bit or 16-bit accumulator, the B
and C registers function as counters, and DE, HL, VP and UP function as address register pairs. In particular the VP register
functions as a base register and the UP register functions as a user stack pointer.
The unique function register changes as shown in Table 2-1 according to the value of the register set select flag (RSS)
in the PSW.
Thus, if the program is described by the functional name, another register set of X, A, C and B can be used by means
of the RSS flag.
The
PD78322 can carry out processed data addressing operations, implied addressing by functional names with
importance attached to the unique function of each register and register addressing by absolute names with a view to fast
processing with a small number of data transfers or creating highly descriptive programs.
Table 2-1. General Register Configuration
R5
A
R6
C
R7
B
R8
VPL
R9
VPH
R10
UPL
R11
UPH
R12
E
R13
D
R14
L
R15
H
Absolute
Functional Name
Name
RSS = 0
RSS = 1
R0
X
R1
A
R2
C
R3
B
R4
X
RP5
UP
RP6
DE
RP7
HL
Absolute
Functional Name
Name
RSS = 0
RSS = 1
RP0
AX
RP1
BC
RP2
AX
RP3
BC
RP4
VP
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