參數(shù)資料
型號(hào)： PIC16C72AT
廠商： Microchip Technology Inc.
英文描述： 28-Pin 8-Bit CMOS Microcontrollers
中文描述： 28引腳8位CMOS微控制器
文件頁數(shù)： 41/120頁
文件大?。?/td> 2125K
代理商： PIC16C72AT
PIC16C62B/72A
1999 Microchip Technology Inc.
Preliminary
DS35008B-page 41
8.3
SSP I
2
C Operation
The SSP module in I
2
C mode fully implements all slave
functions, except general call support, and provides
interrupts on start and stop bits in hardware to support
firmware implementations of the master functions. The
SSP module implements the standard mode specifica-
tions, as well as 7-bit and 10-bit addressing.
Two pins are used for data transfer. These are the
RC3/SCK/SCL pin, which is the clock (SCL), and the
RC4/SDI/SDA pin, which is the data (SDA). The user
must configure these pins as inputs or outputs through
the TRISC<4:3> bits.
The SSP module functions are enabled by setting SSP
Enable bit SSPEN (SSPCON<5>).
FIGURE 8-2:
SSP BLOCK DIAGRAM
(I
2
C MODE)
The SSP module has five registers for I
2
C operation.
These are the:
SSP Control Register (SSPCON)
SSP Status Register (SSPSTAT)
Serial Receive/Transmit Buffer (SSPBUF)
SSP Shift Register (SSPSR) - Not accessible
SSP Address Register (SSPADD)
The SSPCON register allows control of the I
2
C opera-
tion. Four mode selection bits (SSPCON<3:0>) allow
one of the following I
2
C modes to be selected:
I
2
C Slave mode (7-bit address)
I
2
C Slave mode (10-bit address)
I
2
C Slave mode (7-bit address), with start and
stop bit interrupts enabled for firmware master
mode support
I
2
C Slave mode (10-bit address), with start and
stop bit interrupts enabled for firmware master
mode support
I
2
C start and stop bit interrupts enabled for firm-
ware master mode support, slave mode idle
Selection of any I
2
C mode, with the SSPEN bit set,
forces the SCL and SDA pins to be operated as open
drain outputs, provided these pins are programmed to
inputs by setting the appropriate TRISC bits.
Additional information on SSP I
2
C operation may be
found in the PICmicro Mid-Range Reference Manual,
(DS33023).
8.3.1
SLAVE MODE
In slave mode, the SCL and SDA pins must be config-
ured as inputs (TRISC<4:3> set). The SSP module will
override the input state with the output data when
required (slave-transmitter).
When an address is matched or the data transfer after
an address match is received, the hardware automati-
cally will generate the acknowledge (ACK) pulse, and
load the SSPBUF register with the received value in the
SSPSR register.
There are certain conditions that will cause the SSP
module not to give this ACK pulse. This happens if
either of the following conditions occur:
a)
The buffer full bit BF (SSPSTAT<0>) was set
before the transfer was completed.
b)
The overflow bit SSPOV (SSPCON<6>) was set
before the transfer was completed.
In this case, the SSPSR register value is not loaded
into the SSPBUF, but bit SSPIF (PIR1<3>) is set.
Table 8-2 shows what happens when a data transfer
byte is received, given the status of bits BF and SSPOV.
The shaded cells show the condition where user soft-
ware did not properly clear the overflow condition. Flag
bit BF is cleared by reading the SSPBUF register, while
bit SSPOV is cleared through software.
The SCL clock input must have a minimum high and
low for proper operation. The high and low times of the
I
2
C specification, as well as the requirement of the SSP
module, is shown in timing parameter #100, T
HIGH
, and
parameter #101, T
LOW
.
Read
Write
SSPSR reg
Match detect
SSPADD reg
Start and
Stop bit detect
SSPBUF reg
Internal
Data Bus
Addr Match
Set, Reset
S, P bits
(SSPSTAT reg)
RC3/SCK/SCL
RC4/
SDI/
SDA
shift
clock
MSb
LSb
相關(guān)PDF資料
PDF描述
PIC16LC62B 28-Pin 8-Bit CMOS Microcontrollers
PIC16C62BT 28-Pin 8-Bit CMOS Microcontrollers
PIC16LC72A 28-Pin 8-Bit CMOS Microcontrollers
PIC16LC72AT 28-Pin 8-Bit CMOS Microcontrollers
PIC16C72A 28-Pin 8-Bit CMOS Microcontrollers(28腳，8位CMOS微控制器)
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
PIC16C72AT-04/SO 功能描述:8位微控制器 -MCU 3.5KB 128 RAM 22 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
PIC16C72AT-04/SS 功能描述:8位微控制器 -MCU 3.5KB 128 RAM 22 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
PIC16C72AT-04E/SO 功能描述:8位微控制器 -MCU 3.5KB 128 RAM 22 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
PIC16C72AT-04E/SS 功能描述:8位微控制器 -MCU 3.5KB 128 RAM 22 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
PIC16C72AT-04I/SO 功能描述:8位微控制器 -MCU 3.5KB 128 RAM 22 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
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。

采購需求

(若只采購一條型號(hào)，填寫一行即可)

發(fā)布成功！您可以繼續(xù)發(fā)布采購。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

發(fā)布成功！您可以繼續(xù)發(fā)布采購。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

*型號(hào) *數(shù)量 廠商 批號(hào) 封裝
添加更多采購

我的聯(lián)系方式

*
*
*