參數(shù)資料
型號(hào): PIC17LC756AT-08/PT
廠商: Microchip Technology
文件頁數(shù): 10/159頁
文件大?。?/td> 0K
描述: IC MCU OTP 16KX16 A/D 64TQFP
標(biāo)準(zhǔn)包裝: 1,200
系列: PIC® 17C
核心處理器: PIC
芯體尺寸: 8-位
速度: 8MHz
連通性: I²C,SPI,UART/USART
外圍設(shè)備: 欠壓檢測(cè)/復(fù)位,POR,PWM,WDT
輸入/輸出數(shù): 50
程序存儲(chǔ)器容量: 32KB(16K x 16)
程序存儲(chǔ)器類型: OTP
RAM 容量: 902 x 8
電壓 - 電源 (Vcc/Vdd): 3 V ~ 5.5 V
數(shù)據(jù)轉(zhuǎn)換器: A/D 12x10b
振蕩器型: 外部
工作溫度: 0°C ~ 70°C
封裝/外殼: 64-TQFP
包裝: 帶卷 (TR)
其它名稱: PIC17LC756AT-08PT
Section 3 Floating-Point Unit (FPU)
R01UH0025EJ0300 Rev. 3.00
Page 75 of 1336
Sep 24, 2010
SH7261 Group
3.5
FPU Exceptions
3.5.1
FPU Exception Sources
FPU exceptions may occur on floating-point operation instruction and the exception sources are as
follows:
FPU error (E): When FPSCR.DN = 0 and a denormalized number is input (No chance to occur
in the SH2A-FPU)
Invalid operation (V): In case of an invalid operation, such as NaN input
Division by zero (Z): Division with a zero divisor
Overflow (O): When the operation result overflows
Underflow (U): When the operation result underflows
Inexact exception (I): When overflow, underflow, or rounding occurs
The FPU exception cause field in FPSCR contains bits corresponding to all of above sources E, V,
Z, O, U, and I, and the FPU exception flag and enable fields in FPSCR contain bits corresponding
to sources V, Z, O, U, and I, but not E. Thus, FPU errors cannot be disabled.
When an FPU exception occurs, the corresponding bit in the FPU exception cause field is set to 1,
and 1 is added to the corresponding bit in the FPU exception flag field. When an FPU exception
does not occur, the corresponding bit in the FPU exception cause field is cleared to 0, but the
corresponding bit in the FPU exception flag field remains unchanged.
3.5.2
FPU Exception Handling
FPU exception handling is initiated in the following cases:
FPU error (E): FPSCR.DN = 0 and a denormalized number is input (No chance to occur in the
SH2A-FPU)
Invalid operation (V): FPSCR.Enable.V = 1 and invalid operation
Division by zero (Z): FPSCR.Enable.Z = 1 and division with a zero divisor
Overflow (O): FPSCR.Enable.O = 1 and instruction with possibility of operation result
overflow
Underflow (U): FPSCR.Enable.U = 1 and instruction with possibility of operation result
underflow
Inexact exception (I): FPSCR.Enable.I = 1 and instruction with possibility of inexact operation
result
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PIC17LC762-08I/PT 功能描述:8位微控制器 -MCU 16KB 678 RAM 66 I/O RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數(shù)據(jù)總線寬度:8 bit 最大時(shí)鐘頻率:50 MHz 程序存儲(chǔ)器大小:16 KB 數(shù)據(jù) RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風(fēng)格:SMD/SMT
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