參數(shù)資料
型號(hào): SC16C554BIBS,528
廠商: NXP Semiconductors
文件頁數(shù): 15/57頁
文件大?。?/td> 0K
描述: IC UART QUAD SOT778-3
標(biāo)準(zhǔn)包裝: 4,000
通道數(shù): 4,QUART
FIFO's: 16 字節(jié)
電源電壓: 2.5V,3.3V,5V
帶自動(dòng)流量控制功能:
帶故障啟動(dòng)位檢測功能:
帶調(diào)制解調(diào)器控制功能:
帶CMOS:
安裝類型: 表面貼裝
封裝/外殼: 48-VFQFN 裸露焊盤
供應(yīng)商設(shè)備封裝: 48-HVQFN EP(6x6)
包裝: 帶卷 (TR)
其它名稱: 935279072528
SC16C554BIBS-F
SC16C554BIBS-F-ND
2010-2012 Microchip Technology Inc.
DS41413C-page 23
PIC12(L)F1822/PIC16(L)F1823
3.1.1.2
Indirect Read with FSR
The program memory can be accessed as data by set-
ting bit 7 of the FSRxH register and reading the match-
ing INDFx register. The MOVIW instruction will place the
lower eight bits of the addressed word in the W register.
Writes to the program memory cannot be performed via
the INDF registers. Instructions that access the pro-
gram memory via the FSR require one extra instruction
cycle to complete. Example 3-2 demonstrates access-
ing the program memory via an FSR.
The HIGH directive will set bit<7> if a label points to a
location in program memory.
EXAMPLE 3-2:
ACCESSING PROGRAM
MEMORY VIA FSR
3.2
Data Memory Organization
The data memory is partitioned in 32 memory banks
with 128 bytes in a bank. Each bank consists of
12 core registers
20 Special Function Registers (SFR)
Up to 80 bytes of General Purpose RAM (GPR)
16 bytes of common RAM
The active bank is selected by writing the bank number
into the Bank Select Register (BSR). Unimplemented
memory will read as ‘0’. All data memory can be
accessed either directly (via instructions that use the
file registers) or indirectly via the two File Select
Registers
(FSR).
See
for more information.
3.2.1
CORE REGISTERS
The core registers contain the registers that directly
affect
the
basic
operation
of
the
PIC12(L)F1822/16(L)F1823. These registers are listed
below:
INDF0
INDF1
PCL
STATUS
FSR0 Low
FSR0 High
FSR1 Low
FSR1 High
BSR
WREG
PCLATH
INTCON
constants
RETLW DATA0
;Index0 data
RETLW DATA1
;Index1 data
RETLW DATA2
RETLW DATA3
my_function
;… LOTS OF CODE…
MOVLW
LOW constants
MOVWF
FSR1L
MOVLW
HIGH constants
MOVWF
FSR1H
MOVIW 0[FSR1]
;THE PROGRAM MEMORY IS IN W
Note:
The core registers are the first 12
addresses of every data memory bank.
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