參數(shù)資料
型號(hào)： PIC17C75X
英文描述： Micropower Precision Series Reference Family; Package: SOT; No of Pins: 3; Temperature Range: 0°C to +70°C
文件頁(yè)數(shù)： 38/71頁(yè)
文件大?。?/td> 1173K
代理商： PIC17C75X
1996 Microchip Technology Inc.
DS30412C-page 43
PIC17C4X
7.0
TABLE READS AND TABLE
WRITES
The PIC17C4X has four instructions that allow the pro-
cessor 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 mem-
ory.
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 extended microcontroller or
microprocessor mode.
Figure 7-1 through Figure 7-4 show the operation of
these four instructions.
FIGURE 7-1:
TLWT INSTRUCTION
OPERATION
TABLE POINTER
TABLE LATCH (16-bit)
PROGRAM MEMORY
DATA
MEMORY
TBLPTRH
TBLPTRL
TABLATH
TABLATL
f
TLWT
1,f
TLWT
0,f
1
Note 1: 8-bit value, from register 'f', loaded into the
high or low byte in TABLAT (16-bit).
FIGURE 7-2:
TABLWT INSTRUCTION
OPERATION
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
Note 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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PIC17C762-16E/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
PIC17C762-16I/L 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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