參數(shù)資料
型號(hào)： PIC16C73A-10/SP
廠商： Microchip Technology
文件頁(yè)數(shù)： 112/114頁(yè)
文件大?。?/td> 0K
描述： IC MCU OTP 4KX14 A/D PWM 28DIP
產(chǎn)品培訓(xùn)模塊： Asynchronous Stimulus
8-bit PIC® Microcontroller Portfolio
標(biāo)準(zhǔn)包裝： 15
系列： PIC® 16C
核心處理器： PIC
芯體尺寸： 8-位
速度： 10MHz
連通性： 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)： 22
程序存儲(chǔ)器容量： 7KB（4K x 14）
程序存儲(chǔ)器類(lèi)型： OTP
RAM 容量： 192 x 8
電壓 - 電源 (Vcc/Vdd)： 4 V ~ 6 V
數(shù)據(jù)轉(zhuǎn)換器： A/D 5x8b
振蕩器型： 外部
工作溫度： 0°C ~ 70°C
封裝/外殼： 28-DIP（0.300"，7.62mm）
包裝： 管件
其它名稱(chēng)： PIC16C73A-10/SPR
PIC16C73A-10/SPR-ND
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1997 Microchip Technology Inc.
DS30390E-page 97
PIC16C7X
11.5.2
MASTER MODE
Master mode of operation is supported in firmware
using interrupt generation on the detection of the
START and STOP conditions. The STOP (P) and
START (S) bits are cleared from a reset or when the
SSP module is disabled. The STOP (P) and START (S)
bits will toggle based on the START and STOP condi-
tions. Control of the I2C bus may be taken when the P
bit is set, or the bus is idle and both the S and P bits are
clear.
In master mode the SCL and SDA lines are manipu-
lated by clearing the corresponding TRISC<4:3> bit(s).
The output level is always low, irrespective of the
value(s) in PORTC<4:3>. So when transmitting data, a
'1' data bit must have the TRISC<4> bit set (input) and
a '0' data bit must have the TRISC<4> bit cleared (out-
put). The same scenario is true for the SCL line with the
TRISC<3> bit.
The following events will cause SSP Interrupt Flag bit,
SSPIF, to be set (SSP Interrupt if enabled):
START condition
STOP condition
Data transfer byte transmitted/received
Master mode of operation can be done with either the
slave mode idle (SSPM3:SSPM0 = 1011) or with the
slave active. When both master and slave modes are
enabled, the software needs to differentiate the
source(s) of the interrupt.
11.5.3
MULTI-MASTER MODE
In multi-master mode, the interrupt generation on the
detection of the START and STOP conditions allows
the determination of when the bus is free. The STOP
(P) and START (S) bits are cleared from a reset or
when the SSP module is disabled. The STOP (P) and
START (S) bits will toggle based on the START and
STOP conditions. Control of the I2C bus may be taken
when bit P (SSPSTAT<4>) is set, or the bus is idle and
both the S and P bits clear. When the bus is busy,
enabling the SSP Interrupt will generate the interrupt
when the STOP condition occurs.
In multi-master operation, the SDA line must be moni-
tored to see if the signal level is the expected output
level. This check only needs to be done when a high
level is output. If a high level is expected and a low level
is present, the device needs to release the SDA and
SCL lines (set TRISC<4:3>). There are two stages
where this arbitration can be lost, these are:
Address Transfer
Data Transfer
When the slave logic is enabled, the slave continues to
receive. If arbitration was lost during the address trans-
fer stage, communication to the device may be in
progress. If addressed an ACK pulse will be generated.
If arbitration was lost during the data transfer stage, the
device will need to re-transfer the data at a later time.
TABLE 11-5:
REGISTERS ASSOCIATED WITH I2C OPERATION
Address
Name
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
Value on
POR,
BOR
Value on all
other resets
0Bh, 8Bh,
10Bh,18Bh
INTCON
GIE
PEIE
T0IE
INTE
RBIE
T0IF
INTF
RBIF
0000 000x
0000 000u
0Ch
PIR1
PSPIF(1)
ADIF
RCIF
TXIF
SSPIF
CCP1IF TMR2IF TMR1IF
0000 0000
8Ch
PIE1
PSPIE(1)
ADIE
RCIE
TXIE
SSPIE CCP1IE TMR2IE TMR1IE
0000 0000
13h
SSPBUF Synchronous Serial Port Receive Buffer/Transmit Register
xxxx xxxx
uuuu uuuu
93h
SSPADD Synchronous Serial Port (I2C mode) Address Register
0000 0000
14h
SSPCON
WCOL
SSPOV SSPEN
CKP
SSPM3 SSPM2 SSPM1 SSPM0
0000 0000
94h
SSPSTAT
SMP(2)
CKE(2)
D/A
P
S
R/W
UA
BF
0000 0000
87h
TRISC
PORTC Data Direction register
1111 1111
Legend: x = unknown, u = unchanged, - = unimplemented locations read as '0'.
Shaded cells are not used by SSP module in SPI mode.
Note 1:
PSPIF and PSPIE are reserved on the PIC16C73/73A/76, always maintain these bits clear.
2:
The SMP and CKE bits are implemented on the PIC16C76/77 only. All other PIC16C7X devices have these two bits unim-
plemented, read as '0'.
Applicable Devices
72 73 73A 74 74A 76 77
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