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| 型号： | 89C52 |
| 厂商： | Integrated Silicon Solution, Inc. |
| 英文描述： | CMOS SINGLE CHIP 8-BIT MICROCONTROLLER with 8-Kbytes of FLASH |
| 中文描述： | CMOS单芯片的8位单片机，带有8的快闪记忆体 |
| 文件页数： | 9/50页 |
| 文件大小： | 425K |
| 代理商： | 89C52 |
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IS89C52
Integrated Silicon Solution, Inc. — 1-800-379-4774
MC013-1C
11/21/98
9
ISSI
SPECIAL FUNCTION REGISTERS
(Continued)
Stack Pointer (SP)
The Stack Pointer Register is eight bits wide. It is
incremented before data is stored during PUSH and CALL
executions. While the stack may reside anywhere in on-
chip RAM, the Stack Pointer is initialized to 07H after a
reset. This causes the stack to begin at location 08H.
Data Pointer (DPTR)
The Data Pointer consists of a high byte (DPH) and a low
byte (DPL). Its function is to hold a 16-bit address. It may
be manipulated as a 16-bit register or as two independent
8-bit registers.
Ports 0 To 3
P0, P1, P2, and P3 are the SFR latches of Ports 0, 1, 2, and
3, respectively.
Serial Data Buffer (SBUF)
The Serial Data Buffer is actually two separate registers,
a transmit buffer and a receive buffer register. When data
is moved to SBUF, it goes to the transmit buffer, where it
is held for serial transmission. (Moving a byte to SBUF
initiates the transmission.) When data is moved from
SBUF, it comes from the receive buffer.
Timer Registers
Register pairs (TH0, TL0) and (TH1, TL1) are the 16-bit
Counter registers for Timer/Counters 0 and 1, respectively.
Capture Registers
The register pair (RCAP2H, RCAP2L) are the Capture
registers for the Timer 2 Capture Mode. In this mode, in
response to a transition at the IS89C52's T2EX pin, TH2
and TL2 are copied into RCAP2H and RCAP2L. Timer 2
also has a 16-bit auto-reload mode, and RCAP2H and
RCAP2L hold the reload value for this mode.
Control Registers
Special Function Registers IP, IE, TMOD, TCON, SCON,
and PCON contain control and status bits for the interrupt
system, the Timer/Counters, and the serial port. They are
described in later sections of this chapter.
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| 89C52-24JC | 制造商: 功能描述: 制造商:undefined 功能描述: |
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| 89C536 | 制造商:PHILIPS 制造商全称:NXP Semiconductors 功能描述:80C51 8-bit microcontroller family 16K/64K/512 FLASH |
| 89C538 | 制造商:PHILIPS 制造商全称:NXP Semiconductors 功能描述:CMOS single-chip 8-bit microcontrollers with FLASH program memory |
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