參數(shù)資料
型號(hào)： DSPIC30F4013-30I/P
廠商： Microchip Technology
文件頁數(shù)： 32/153頁
文件大?。?/td> 0K
描述： IC DSPIC MCU/DSP 48K 40DIP
產(chǎn)品培訓(xùn)模塊： Serial Communications using dsPIC30F CAN
Serial Communications using dsPIC30F I2C
Serial Communications using dsPIC30F SPI
Serial Communications using dsPIC30F UART
dsPIC30F 12 bit ADC - Part 2
dsPIC30F Addressing Modes - Part 1
dsPIC30F Architecture - Part 1
dsPIC30F DSP Engine & ALU
dsPIC30F Interrupts
dsPIC30F Motor Control PWM
dsPIC Timers
Asynchronous Stimulus
dsPIC30F Addressing Modes - Part 2
dsPIC30F Architecture - Part 2
dsPIC30F 12-bit ADC Part 1
標(biāo)準(zhǔn)包裝： 10
系列： dsPIC™ 30F
核心處理器： dsPIC
芯體尺寸： 16-位
速度： 30 MIP
連通性： CAN，I²C，SPI，UART/USART
外圍設(shè)備： AC'97，欠壓檢測(cè)/復(fù)位，I²S，POR，PWM，WDT
輸入/輸出數(shù)： 30
程序存儲(chǔ)器容量： 48KB（16K x 24）
程序存儲(chǔ)器類型： 閃存
EEPROM 大?。?/td> 1K x 8
RAM 容量： 2K x 8
電壓 - 電源 (Vcc/Vdd)： 2.5 V ~ 5.5 V
數(shù)據(jù)轉(zhuǎn)換器： A/D 13x12b
振蕩器型： 內(nèi)部
工作溫度： -40°C ~ 85°C
封裝/外殼： 40-DIP（0.600"，15.24mm）
包裝： 管件
產(chǎn)品目錄頁面： 651 (CN2011-ZH PDF)
配用： AC30F003-ND - MODULE SOCKET DSPIC30F 40DIP
DV164005-ND - KIT ICD2 SIMPLE SUIT W/USB CABLE
ACICE0206-ND - ADAPTER MPLABICE 40P 600 MIL
其它名稱： DSPIC30F4013-30IP
2010 Microchip Technology Inc.
DS70138G-page 127
dsPIC30F3014/4013
18.3.14
BUFFER LENGTH CONTROL
The amount of data that is buffered between interrupts
is determined by the buffer length (BLEN<1:0>) control
bits in the DCICON2 SFR. The size of the transmit and
receive buffers may be varied from 1 to 4 data words
using the BLEN control bits. The BLEN control bits are
compared to the current value of the DCI buffer control
unit address counter. When the two LSbs of the DCI
address counter match the BLEN<1:0> value, the buf-
fer control unit is reset to ‘0’. In addition, the contents of
the receive shadow registers are transferred to the
receive buffer registers and the contents of the transmit
buffer registers are transferred to the transmit shadow
registers.
18.3.15
BUFFER ALIGNMENT WITH DATA
FRAMES
There is no direct coupling between the position of the
AGU Address Pointer and the data frame boundaries.
This means that there is an implied assignment of each
transmit and receive buffer that is a function of the
BLEN control bits and the number of enabled data slots
via the TSE and RSE control bits.
As an example, assume that a 4-word data frame is
chosen and that we want to transmit on all four time
slots in the frame. This configuration would be estab-
lished by setting the TSE0, TSE1, TSE2, and TSE3
control bits in the TSCON SFR. With this module setup,
the TXBUF0 register would be naturally assigned to
slot #0, the TXBUF1 register would be naturally
assigned to slot #1, and so on.
18.3.16
TRANSMIT STATUS BITS
There are two transmit status bits in the DCISTAT SFR.
The TMPTY bit is set when the contents of the transmit
buffer registers are transferred to the transmit shadow
registers. The TMPTY bit may be polled in software to
determine when the transmit buffer registers may be
written. The TMPTY bit is cleared automatically by the
hardware when a write to one of the four transmit
buffers occurs.
The TUNF bit is read-only and indicates that a transmit
underflow has occurred for at least one of the transmit
buffer registers that is in use. The TUNF bit is set at the
time the transmit buffer registers are transferred to the
transmit shadow registers. The TUNF status bit is
cleared automatically when the buffer register that
underflowed is written by the CPU.
18.3.17
RECEIVE STATUS BITS
There are two receive status bits in the DCISTAT SFR.
The RFUL status bit is read-only and indicates that new
data is available in the receive buffers. The RFUL bit is
cleared automatically when all receive buffers in use
have been read by the CPU.
The ROV status bit is read-only and indicates that a
receive overflow has occurred for at least one of the
receive buffer locations. A receive overflow occurs
when the buffer location is not read by the CPU before
new data is transferred from the shadow registers. The
ROV status bit is cleared automatically when the buffer
register that caused the overflow is read by the CPU.
When a receive overflow occurs for a specific buffer
location, the old contents of the buffer are overwritten.
Note:
When more than four time slots are active
within a data frame, the user code must
keep track of which time slots are to be
read/written at each interrupt. In some
cases, the alignment between transmit/
receive buffers and their respective slot
assignments could be lost. Examples of
such
cases
include
an
emulation
breakpoint or a hardware trap. In these
situations, the user should poll the SLOT
status bits to determine what data should
be loaded into the buffer registers to
resynchronize the software with the DCI
module.
Note:
The transmit status bits only indicate
status for buffer locations that are used by
the module. If the buffer length is set to
less than four words, for example, the
unused buffer locations do not affect the
transmit status bits.
Note:
The receive status bits only indicate status
for buffer locations that are used by the
module. If the buffer length is set to less
than four words, for example, the unused
buffer locations do not affect the transmit
status bits.
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