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參數(shù)資料
| 型號(hào)： | PIC18LF96J65-I/PT |
| 廠商： | Microchip Technology |
| 文件頁(yè)數(shù)： | 131/131頁(yè) |
| 文件大?。?/td> | 0K |
| 描述： | IC PIC MCU FLASH 48KX16 100TQFP |
| 標(biāo)準(zhǔn)包裝： | 90 |
| 系列： | PIC® 18F |
| 核心處理器： | PIC |
| 芯體尺寸： | 8-位 |
| 速度： | 41.667MHz |
| 連通性： | EBI/EMI，以太網(wǎng)，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)： | 70 |
| 程序存儲(chǔ)器容量： | 96KB（48K x 16） |
| 程序存儲(chǔ)器類型： | 閃存 |
| RAM 容量： | 3808 x 8 |
| 電壓 - 電源 (Vcc/Vdd)： | 2 V ~ 3.6 V |
| 數(shù)據(jù)轉(zhuǎn)換器： | A/D 16x10b |
| 振蕩器型： | 內(nèi)部 |
| 工作溫度： | -40°C ~ 85°C |
| 封裝/外殼： | 100-TQFP |
| 包裝： | 托盤(pán) |
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2011 Microchip Technology Inc.
DS39762F-page 99
PIC18F97J60 FAMILY
6.4.3.1
FSR Registers and the
INDF Operand
At the core of Indirect Addressing are three sets of
registers: FSR0, FSR1 and FSR2. Each represents a
pair of 8-bit registers: FSRnH and FSRnL. The four
upper bits of the FSRnH register are not used, so each
FSR pair holds a 12-bit value. This represents a value
that can address the entire range of the data memory
in a linear fashion. The FSR register pairs, then, serve
as pointers to data memory locations.
Indirect Addressing is accomplished with a set of Indirect
File Operands: INDF0 through INDF2. These can be
thought of as “virtual” registers. They are mapped in the
SFR space but are not physically implemented. Reading
or writing to a particular INDF register actually accesses
its corresponding FSR register pair. A read from INDF1,
for example, reads the data at the address indicated by
FSR1H:FSR1L. Instructions that use the INDF registers
as operands actually use the contents of their
corresponding FSR as a pointer to the instruction’s
target. The INDF operand is just a convenient way of
using the pointer.
Because Indirect Addressing uses a full, 12-bit
address, data RAM banking is not necessary. Thus, the
current contents of the BSR and Access RAM bit have
no effect on determining the target address.
FIGURE 6-9:
INDIRECT ADDRESSING
FSR1H:FSR1L
0
7
Data Memory
000h
100h
200h
300h
F00h
E00h
FFFh
Bank 0
Bank 1
Bank 2
Bank 14
Bank 15
Bank 3
through
Bank 13
ADDWF, INDF1, 1
0
7
Using an instruction with one of the
Indirect Addressing registers as the
operand....
...uses the 12-bit address stored in
the FSR pair associated with that
register....
...to determine the data memory
location to be used in that operation.
In this case, the FSR1 pair contains
FCCh. This means the contents of
location FCCh will be added to that
of the W register and stored back in
FCCh.
xx xx 1 1 1 1
1 100 1 100
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