參數(shù)資料
型號: PIC17C766T-33I/PT
廠商: Microchip Technology
文件頁數(shù): 116/159頁
文件大?。?/td> 0K
描述: IC MCU OTP 16KX16 A/D 80TQFP
標準包裝: 1,200
系列: PIC® 17C
核心處理器: PIC
芯體尺寸: 8-位
速度: 33MHz
連通性: I²C,SPI,UART/USART
外圍設備: 欠壓檢測/復位,POR,PWM,WDT
輸入/輸出數(shù): 66
程序存儲器容量: 32KB(16K x 16)
程序存儲器類型: OTP
RAM 容量: 902 x 8
電壓 - 電源 (Vcc/Vdd): 4.5 V ~ 5.5 V
數(shù)據(jù)轉換器: A/D 16x10b
振蕩器型: 外部
工作溫度: -40°C ~ 85°C
封裝/外殼: 80-TQFP
包裝: 帶卷 (TR)
配用: XLT80PT3-ND - SOCKET TRAN ICE 80MQFP/TQFP
AC174011-ND - MODULE SKT PROMATEII 80TQFP
2000 Microchip Technology Inc.
DS30289B-page 59
PIC17C7XX
8.0
TABLE READS AND TABLE
WRITES
The PIC17C7XX has four instructions that allow the
processor to move data from the data memory space to
the program memory space, and vice versa. Since the
program memory space is 16-bits wide and the data
memory space is 8-bits wide, two operations are
required to move 16-bit values to/from the data
memory.
The TLWT t,f and TABLWT t,i,f instructions are
used to write data from the data memory space to the
program memory space. The TLRD t,f and TABLRD
t,i,f
instructions are used to write data from the pro-
gram memory space to the data memory space.
The program memory can be internal or external. For
the program memory access to be external, the device
needs to be operating in Microprocessor or Extended
Microcontroller mode.
Figure 8-1 through Figure 8-4 show the operation of
these four instructions. The steps show the sequence
of operation.
FIGURE 8-1:
TLWT
INSTRUCTION
OPERATION
FIGURE 8-2:
TABLWT
INSTRUCTION
OPERATION
TABLE POINTER
TABLE LATCH (16-bit)
Program Memory
Data
Memory
TBLPTRH
TBLPTRL
TABLATH
TABLATL
f
TLWT 1,f
TLWT 0,f
1
Step 1: 8-bit value from register ’f’, loaded into the high or low
byte in TABLAT (16-bit).
TABLE POINTER
TABLE LATCH (16-bit)
Program Memory
Data
Memory
TBLPTRH
TBLPTRL
TABLATH
TABLATL
f
TABLWT 1,i,f
TABLWT 0,i,f
1
Prog-Mem
(TBLPTR)
2
Step 1: 8-bit value from register ’f’, loaded into the high or low
byte in TABLAT (16-bit).
2: 16-bit TABLAT value written to address Program Memory
(TBLPTR).
3: If “i” = 1, then TBLPTR = TBLPTR + 1,
If “i” = 0, then TBLPTR is unchanged.
3
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