參數(shù)資料
型號(hào): AT89C5131A-PUTUM
廠(chǎng)商: Atmel
文件頁(yè)數(shù): 10/188頁(yè)
文件大小: 0K
描述: IC 8051 MCU FLASH 32K USB 32QFN
產(chǎn)品培訓(xùn)模塊: MCU Product Line Introduction
標(biāo)準(zhǔn)包裝: 1,300
系列: AT89C513x
核心處理器: C52X2
芯體尺寸: 8-位
速度: 48MHz
連通性: I²C,SPI,UART/USART,USB
外圍設(shè)備: LED,POR,PWM,WDT
輸入/輸出數(shù): 18
程序存儲(chǔ)器容量: 32KB(32K x 8)
程序存儲(chǔ)器類(lèi)型: 閃存
EEPROM 大小: 4K x 8
RAM 容量: 1.25K x 8
電壓 - 電源 (Vcc/Vdd): 2.7 V ~ 5.5 V
振蕩器型: 內(nèi)部
工作溫度: -40°C ~ 85°C
封裝/外殼: 32-VQFN 裸露焊盤(pán)
包裝: 托盤(pán)
配用: AT89OCD-01-ND - USB EMULATOR FOR AT8XC51 MCU
AT89STK-10-ND - KIT EVAL APPL MASS STORAGE
AT89STK-05-ND - KIT STARTER FOR AT89C5131
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107
4337K–USB–04/08
AT89C5130A/31A-M
20.1.4
Slave Transmitter Mode
In the slave transmitter mode, a number of data bytes are transmitted to a master receiver
(Figure 20-7). Data transfer is initialized as in the slave receiver mode. When SSADR and
SSCON have been initialized, the TWI module waits until it is addressed by its own slave
address followed by the data direction bit which must be at logic 1 (R) for TWI to operate in the
slave transmitter mode. After its own slave address and the R bit have been received, the serial
interrupt flag is set and a valid status code can be read from SSCS. This status code is used to
vector to an interrupt service routine. The appropriate action to be taken for each of these status
code is detailed in Table . The slave transmitter mode may also be entered if arbitration is lost
while the TWI module is in the master mode.
If the AA bit is reset during a transfer, the TWI module will transmit the last byte of the transfer
and enter state C0h or C8h. the TWI module is switched to the not addressed slave mode and
will ignore the master receiver if it continues the transfer. Thus the master receiver receives all
1’s as serial data. While AA is reset, the TWI module does not respond to its own slave address.
However, the 2-wire bus is still monitored and address recognition may be resume at any time
by setting AA. This means that the AA bit may be used to temporarily isolate the TWI module
from the 2-wire bus.
20.1.5
Miscellaneous States
There are two SSCS codes that do not correspond to a define TWI hardware state (Table 20-9 ).
These codes are discuss hereafter.
Status F8h indicates that no relevant information is available because the serial interrupt flag is
not set yet. This occurs between other states and when the TWI module is not involved in a
serial transfer.
Status 00h indicates that a bus error has occurred during a TWI serial transfer. A bus error is
caused when a START or a STOP condition occurs at an illegal position in the format frame.
Examples of such illegal positions happen during the serial transfer of an address byte, a data
byte, or an acknowledge bit. When a bus error occurs, SI is set. To recover from a bus error, the
STO flag must be set and SI must be cleared. This causes the TWI module to enter the not
addressed slave mode and to clear the STO flag (no other bits in SSCON are affected). The
SDA and SCL lines are released and no STOP condition is transmitted.
20.2
Notes
The TWI module interfaces to the external 2-wire bus via two port pins: SCL (serial clock line)
and SDA (serial data line). To avoid low level asserting on these lines when the TWI module is
enabled, the output latches of SDA and SLC must be set to logic 1.
Table 20-4.
Bit Frequency Configuration
Bit Frequency ( kHz)
CR2
CR1
CR0
FOSCA= 12 MHz
FOSCA = 16 MHz
FOSCA divided by
0
47
62.5
256
0
1
53.5
71.5
224
0
1
0
62.5
83
192
0
1
75
100
160
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AT89C5131A-RDTIL 功能描述:IC 8051 MCU FLASH 32K USB 64VQFP RoHS:否 類(lèi)別:集成電路 (IC) >> 嵌入式 - 微控制器, 系列:AT89C513x 標(biāo)準(zhǔn)包裝:9 系列:87C 核心處理器:8051 芯體尺寸:8-位 速度:40/20MHz 連通性:UART/USART 外圍設(shè)備:POR,WDT 輸入/輸出數(shù):32 程序存儲(chǔ)器容量:32KB(32K x 8) 程序存儲(chǔ)器類(lèi)型:OTP EEPROM 大小:- RAM 容量:256 x 8 電壓 - 電源 (Vcc/Vdd):4.5 V ~ 5.5 V 數(shù)據(jù)轉(zhuǎn)換器:- 振蕩器型:內(nèi)部 工作溫度:0°C ~ 70°C 封裝/外殼:40-DIP(0.600",15.24mm) 包裝:管件
AT89C5131A-RDTIM 制造商:ATMEL 制造商全稱(chēng):ATMEL Corporation 功能描述:8-bit Flash Microcontroller with Full Speed USB Device
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