- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄223639 > CY7C63742-SC (CYPRESS SEMICONDUCTOR CORP) 8-BIT, OTPROM, 12 MHz, RISC MICROCONTROLLER, PDSO24 PDF資料下載
參數(shù)資料
| 型號： | CY7C63742-SC |
| 廠商： | CYPRESS SEMICONDUCTOR CORP |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | 8-BIT, OTPROM, 12 MHz, RISC MICROCONTROLLER, PDSO24 |
| 封裝： | 0.300 INCH, PLASTIC, SOIC-24 |
| 文件頁數(shù)： | 47/48頁 |
| 文件大小： | 425K |
| 代理商： | CY7C63742-SC |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁第10頁第11頁第12頁第13頁第14頁第15頁第16頁第17頁第18頁第19頁第20頁第21頁第22頁第23頁第24頁第25頁第26頁第27頁第28頁第29頁第30頁第31頁第32頁第33頁第34頁第35頁第36頁第37頁第38頁第39頁第40頁第41頁第42頁第43頁第44頁第45頁第46頁當前第47頁第48頁
PRELIMINARY
FO R
enCoRe USB CY7C63722/23
CY7C63742/43
8
6.0
Programming Model
Refer to the CYASM Assembler User’s Guide for more details on firmware operation with the CY7C637xx microcontrollers.
6.1
Program Counter (PC)
The 13-bit program counter (PC) allows access for up to 8 Kbytes of EPROM using the CY7C637xx architecture. The program
counter is cleared during reset, such that the first instruction executed after a reset is at address 0x0000. This is typically a jump
instruction to a reset handler that initializes the application.
The lower 8 bits of the program counter are incremented as instructions are loaded and executed. The upper 5 bits of the program
counter are incremented by executing an XPAGE instruction. As a result, the last instruction executed within a 256-byte “page”
of sequential code should be an XPAGE instruction. The assembler directive “XPAGEON” will cause the assembler to insert
XPAGE instructions automatically. As instructions can be either one or two bytes long, the assembler may occasionally need to
insert a NOP followed by an XPAGE for correct execution.
The program counter of the next instruction to be executed, carry flag, and zero flag are saved as two bytes on the program stack
during an interrupt acknowledge or a CALL instruction. The program counter, carry flag, and zero flag are restored from the
program stack only during a RETI instruction.
Please note the program counter cannot be accessed directly by the firmware. The program stack can be examined by reading
SRAM from location 0x00 and up.
6.2
8-bit Accumulator (A)
The accumulator is the general purpose, do everything register in the architecture where results are usually calculated.
6.3
8-bit Index Register (X)
The index register “X” is available to the firmware as an auxiliary accumulator. The X register also allows the processor to perform
indexed operations by loading an index value into X.
6.4
8-bit Program Stack Pointer (PSP)
During a reset, the program stack pointer (PSP) is set to zero. This means the program “stack” starts at RAM address 0x00 and
“grows” upward from there. Note the program stack pointer is directly addressable under firmware control, using the MOV PSP,A
instruction. The PSP supports interrupt service under hardware control and CALL, RET, and RETI instructions under firmware
control.
During an interrupt acknowledge, interrupts are disabled and the program counter, carry flag, and zero flag are written as two
bytes of data memory. The first byte is stored in the memory addressed by the program stack pointer, then the PSP is incremented.
The second byte is stored in memory addressed by the program stack pointer and the PSP is incremented again. The net effect
is to store the program counter and flags on the program “stack” and increment the program stack pointer by two.
The return from interrupt (RETI) instruction decrements the program stack pointer, then restores the second byte from memory
addressed by the PSP. The program stack pointer is decremented again and the first byte is restored from memory addressed
by the PSP. After the program counter and flags have been restored from stack, the interrupts are enabled. The effect is to restore
the program counter and flags from the program stack, decrement the program stack pointer by two, and re-enable interrupts.
The call subroutine (CALL) instruction stores the program counter and flags on the program stack and increments the PSP by two.
The return from subroutine (RET) instruction restores the program counter, but not the flags, from program stack and decrements
the PSP by two.
Note that there are restrictions in using some jump, call, and index instructions across the 4KB boundary of the program memory.
Refer to the CYASM Assembler User’s Guide for a detailed description.
6.5
8-bit Data Stack Pointer (DSP)
The data stack pointer (DSP) supports PUSH and POP instructions that use the data stack for temporary storage. A PUSH
instruction will pre-decrement the DSP, then write data to the memory location addressed by the DSP. A POP instruction will read
data from the memory location addressed by the DSP, then post-increment the DSP.
During a reset, the Data Stack Pointer will be set to zero. A PUSH instruction when DSP equal zero will write data at the top of
the data RAM (address 0xFF). This would write data to the memory area reserved for a FIFO for USB endpoint 0. In non-USB
applications, this works fine and is not a problem.
相關PDF資料 |
PDF描述 |
|---|---|
| CY8C42123-24SXIT | MULTIFUNCTION PERIPHERAL, PDSO8 |
| CY8CLED16P01-28PVXI | SPECIALTY MICROPROCESSOR CIRCUIT, PDSO28 |
| CYW2332BCI | PLL FREQUENCY SYNTHESIZER, 1200 MHz, QCC24 |
| CYW255OXC | 255 SERIES, LOW SKEW CLOCK DRIVER, 24 TRUE OUTPUT(S), 0 INVERTED OUTPUT(S), PDSO48 |
| CYW256OXCT | 256 SERIES, LOW SKEW CLOCK DRIVER, 12 TRUE OUTPUT(S), 0 INVERTED OUTPUT(S), PDSO28 |
相關代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| CY7C63743C-PXC | 功能描述:輸入/輸出控制器接口集成電路 USB Combo Lo Spd PS/2 Periphrl Cntrlr RoHS:否 制造商:Silicon Labs 產(chǎn)品: 輸入/輸出端數(shù)量: 工作電源電壓: 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 安裝風格:SMD/SMT 封裝 / 箱體:QFN-64 封裝:Tray |
| CY7C63743C-QXC | 功能描述:輸入/輸出控制器接口集成電路 LO Speed 3 Endpoint USB COM RoHS:否 制造商:Silicon Labs 產(chǎn)品: 輸入/輸出端數(shù)量: 工作電源電壓: 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 安裝風格:SMD/SMT 封裝 / 箱體:QFN-64 封裝:Tray |
| CY7C63743C-SXC | 功能描述:輸入/輸出控制器接口集成電路 USB Combo Lo Spd PS/2 Periphrl Cntrlr RoHS:否 制造商:Silicon Labs 產(chǎn)品: 輸入/輸出端數(shù)量: 工作電源電壓: 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 安裝風格:SMD/SMT 封裝 / 箱體:QFN-64 封裝:Tray |
| CY7C63743C-SXCT | 功能描述:輸入/輸出控制器接口集成電路 USB/PS/2 Combo LoSpd Peripheral Controlr RoHS:否 制造商:Silicon Labs 產(chǎn)品: 輸入/輸出端數(shù)量: 工作電源電壓: 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 安裝風格:SMD/SMT 封裝 / 箱體:QFN-64 封裝:Tray |
| CY7C63743-PC | 功能描述:IC MCU 8K LS USB/PS-2 24-DIP RoHS:否 類別:集成電路 (IC) >> 嵌入式 - 微控制器 - 特定應用 系列:enCoRe™ 產(chǎn)品變化通告:Product Discontinuation 26/Aug/2009 標準包裝:250 系列:- 應用:網(wǎng)絡處理器 核心處理器:4Kc 程序存儲器類型:- 控制器系列:- RAM 容量:16K x 8 接口:以太網(wǎng)，UART，USB 輸入/輸出數(shù):- 電源電壓:1.8V, 3.3V 工作溫度:- 安裝類型:表面貼裝 封裝/外殼:208-LQFP 包裝:帶卷 (TR) 供應商設備封裝:PG-LQFP-208 其它名稱:SP000314382 |
發(fā)布緊急采購，3分鐘左右您將得到回復。