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參數(shù)資料
| 型號(hào)： | MR80C52TXXX-16SHXXX:R |
| 廠商： | ATMEL CORP |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | 8-BIT, MROM, 16 MHz, MICROCONTROLLER, CQCC44 |
| 封裝： | LCC-44 |
| 文件頁(yè)數(shù)： | 193/336頁(yè) |
| 文件大?。?/td> | 8801K |
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272
ATmega16M1/32M1/64M1 [DATASHEET]
8209E–AVR–11/2012
26.8
Register description
26.8.1
SPMCSR – Store Program Memory Control and Status Register
The Store Program Memory Control and Status Register contains the control bits needed to control the boot loader
operations.
Bit 7 – SPMIE: SPM Interrupt Enable
When the SPMIE bit is written to one, and the I-bit in the Status Register is set (one), the SPM ready interrupt will
be enabled. The SPM ready Interrupt will be executed as long as the SPMEN bit in the SPMCSR Register is
cleared.
Bit 6 – RWWSB: Read-While-Write Section Busy
When a Self-Programming (Page Erase or Page Write) operation to the RWW section is initiated, the RWWSB will
be set (one) by hardware. When the RWWSB bit is set, the RWW section cannot be accessed. The RWWSB bit
will be cleared if the RWWSRE bit is written to one after a Self-Programming operation is completed. Alternatively
the RWWSB bit will automatically be cleared if a page load operation is initiated.
Bit 5 – SIGRD: Signature Row Read
If this bit is written to one at the same time as SPMEN, the next LPM instruction within three clock cycles will read
a byte from the signature row into the destination register. see “Reading the Signature Row from software” on page
266 for details. An SPM instruction within four cycles after SIGRD and SPMEN are set will have no effect. This
operation is reserved for future use and should not be used.
Bit 4 – RWWSRE: Read-While-Write Section Read Enable
When programming (Page Erase or Page Write) to the RWW section, the RWW section is blocked for reading (the
RWWSB will be set by hardware). To re-enable the RWW section, the user software must wait until the program-
ming is completed (SPMEN will be cleared). Then, if the RWWSRE bit is written to one at the same time as
SPMEN, the next SPM instruction within four clock cycles re-enables the RWW section. The RWW section cannot
be re-enabled while the Flash is busy with a Page Erase or a Page Write (SPMEN is set). If the RWWSRE bit is
written while the Flash is being loaded, the Flash load operation will abort and the data loaded will be lost.
Bit 3 – BLBSET: Boot Lock Bit Set
If this bit is written to one at the same time as SPMEN, the next SPM instruction within four clock cycles sets Boot
Lock bits and Memory Lock bits, according to the data in R0. The data in R1 and the address in the Z-pointer are
ignored. The BLBSET bit will automatically be cleared upon completion of the Lock bit set, or if no SPM instruction
is executed within four clock cycles.
An LPM instruction within three cycles after BLBSET and SPMEN are set in the SPMCSR Register, will read either
the Lock bits or the Fuse bits (depending on Z0 in the Z-pointer) into the destination register. See “Reading the
Fuse and Lock Bits from software” on page 265 for details.
Bit 2 – PGWRT: Page Write
If this bit is written to one at the same time as SPMEN, the next SPM instruction within four clock cycles executes
Page Write, with the data stored in the temporary buffer. The page address is taken from the high part of the Z-
pointer. The data in R1 and R0 are ignored. The PGWRT bit will auto-clear upon completion of a Page Write, or if
no SPM instruction is executed within four clock cycles. The CPU is halted during the entire Page Write operation if
the NRWW section is addressed.
Bit
7
6
5
4
3
2
1
0
SPMIE
RWWSB
SIGRD
RWWSRE
BLBSET
PGWRT
PGERS
SPMEN
SPMCSR
Read/write
R/W
R
R/W
Initial value
0
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| MQ80C32E-20:R | 8-BIT, 20 MHz, MICROCONTROLLER, CQFP44 |
| MQ80C52CXXX-16:RD | 8-BIT, MROM, 16 MHz, MICROCONTROLLER, CQFP44 |
| MF280C51C-25R | 8-BIT, MROM, 25 MHz, MICROCONTROLLER, PQFP44 |
| MQ80C52XXX-16SBR | 8-BIT, MROM, 16 MHz, MICROCONTROLLER, CQFP44 |
| MD80C52EXXX-20P883 | 8-BIT, MROM, 20 MHz, MICROCONTROLLER, CDIP40 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MR80C86 | 制造商:INTERSIL 制造商全稱:Intersil Corporation 功能描述:CMOS 16-Bit Microprocessor |
| MR80C86/B | 制造商:Rochester Electronics LLC 功能描述:- Bulk 制造商:Harris Corporation 功能描述:Microprocessor, 16 Bit, 44 Pin, Ceramic, LCC |
| MR80C86-2 | 制造商:INTERSIL 制造商全稱:Intersil Corporation 功能描述:CMOS 16-Bit Microprocessor |
| MR80C86-2/883 | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
| MR80C86-2/B | 制造商:Intersil Corporation 功能描述:MPU 80C86 16BIT CMOS 8MHZ 44PLCC - Rail/Tube |
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