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參數資料
| 型號： | 71M6543H-IGTR/F |
| 廠商： | MAXIM INTEGRATED PRODUCTS INC |
| 元件分類： | 模擬信號調理 |
| 英文描述： | SPECIALTY ANALOG CIRCUIT, PQFP100 |
| 封裝： | LEAD FREE, LQFP-100 |
| 文件頁數： | 86/157頁 |
| 文件大?。?/td> | 2178K |
| 代理商： | 71M6543H-IGTR/F |
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71M6543F/H and 71M6543G/GH Data Sheet
34
2008–2011 Teridian Semiconductor Corporation
v1.2
Accumulator (ACC, A, SFR 0x E0):
ACC is the accumulator register. Most instructions use the accumulator to hold the operand. The mnemonics
for accumulator-specific instructions refer to accumulator as A, not ACC.
B Register (SFR 0xF0):
The B register is used during multiply and divide instructions. It can also be used as a scratch-pad register to
hold temporary data.
Program Status Word (PSW, SFR 0xD0):
This register contains various flags and control bits for the selection of the register banks (see Table 13).
Table 13: PSW Bit Functions (SFR 0xD0)
PSW Bit
Symbol
Function
7
CV
Carry flag.
6
AC
Auxiliary Carry flag for BCD operations.
5
F0
General purpose Flag 0 available for user.
F0 is not to be confused with the F0 flag in the CESTATUS register.
4
RS1
Register bank select control bits. The contents of RS1 and RS0 select the
working register bank:
RS1/RS0
Bank selected
Location
00
Bank 0
0x00 – 0x07
01
Bank 1
0x08 – 0x0F
10
Bank 2
0x10 – 0x17
11
Bank 3
0x18 – 0x1F
3
RS0
2
OV
Overflow flag.
1
–
User defined flag.
0
P
Parity flag, affected by hardware to indicate odd or even number of one bits in
the Accumulator, i.e. even parity.
Stack Pointer (SP, SFR 0x81):
The stack pointer is a 1-byte register initialized to 0x07 after reset. This register is incremented before
PUSH and CALL instructions, causing the stack to begin at location 0x08.
Data Pointer:
The data pointers (DPTR and DPRT1) are 2 bytes wide. The lower part is DPL (SFR 0x82) and DPL1 (SFR
0x84), respectively. The highest is DPH (SFR 0x83) and DPH1 (SFR 0x85), respectively. The data pointers
can be loaded as two registers (e.g. MOV DPL,#data8). They are generally used to access external code
or data space (e.g. MOVC A,@A+DPTR or MOVX A,@DPTR respectively).
Program Counter:
The program counter (PC) is 2 bytes wide and initialized to 0x0000 after reset. This register is incremented
when fetching operation code or when operating on data from program memory.
Port Registers:
SEGDIO0 through SEGDIO15 are controlled by Special Function Registers P0, P1, P2, and P3 as shown
in Table 14. Above SEGDIO15, the LCD_SEGDIOn[ ] registers in I/O RAM are used. Since the direction
bits are contained in the upper nibble of each SFR Pn register and the DIO bits are contained in the lower
nibble, it is possible to configure the direction of a given DIO pin and set its output value with a single
write operation, thus facilitating the implementation of bit-banged interfaces. Writing a 1 to a DIO_DIR
bit configures the corresponding DIO as an output, while writing a 0 configures it as an input. Writing a 1
to a DIO bit causes the corresponding pin to be at high level (V3P3), while writing a 0 causes the
corresponding pin to be held at a low level (GND). See 2.5.10 Digital I/O for additional details.
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