PIC14000-04I/SS Microchip Technology, PIC14000-04I/SS Datasheet - Page 54

• Manufacturer Part Number: PIC14000-04I/SS
• Description: IC, 8BIT MCU, PIC14, 4MHZ, SSOP-28
• Manufacturer: Microchip Technology

Specifications of PIC14000-04I/SS

• Controller Family/series: PIC14
• No. Of I/o's: 22
• Ram Memory Size: 192Byte
• Cpu Speed: 4MHz
• No. Of Timers: 2
• Interface: I2C
• Digital Ic Case Style: SSOP
• Core Size: 8 Bit
• Program Memory Size: 4096 X 14
• Embedded Interface Type: I2C
• Rohs Compliant: Yes
• Processor Series: PIC14000
• Core: PIC
• Data Bus Width: 8 bit
• Program Memory Type: EPROM
• Data Ram Size: 192 B
• Interface Type: SPI, UART
• Maximum Clock Frequency: 20 MHz
• Number Of Programmable I/os: 22
• Number Of Timers: 1
• Operating Supply Voltage: 2.7 V to 6 V
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Package / Case: SSOP-28
• Development Tools By Supplier: ICE2000
• Minimum Operating Temperature: - 40 C
• On-chip Adc: 14 bit
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

PIC14000
FIGURE 7-17: OPERATION OF THE I
DS40122B-page 54
IDLE_MODE (7-bit):
if (Addr_match)
RCV_MODE:
if ((I2CBUF=Full) OR (I
else
Receive 8-bits in I
Set interrupt;
XMIT_MODE:
While ((I2CBUF = Empty) AND (CKP=0)) Hold SCL Low;
Send byte;
Set interrupt;
if (ACK Received = 1)
else if (ACK Received = 0) Go back to XMIT_MODE;
IDLE_MODE (10-Bit):
If (High_byte_addr_match AND (R/W = 0))
else if (High_byte_addr_match AND (R/W = 1)
{
}
{
}
{
}
{
else PRIOR_ADDR_MATCH = FALSE;
}
Set I
Do not acknowledge;
send ACK = 0;
Set interrupt;
if ((I2CBUF = Full) OR ((I2COV = 1))
else
if (PRIOR_ADDR_MATCH)
transfer I
PRIOR_ADDR_MATCH = FALSE;
2
CSR;
2
COV;
2
COV = 1))
2
CSR
{
}
{
}
{
}
I
{
}
{
}
Do not acknowledge;
Set UA = 1;
Send ACK = 0;
While (I2CADD not updated) Hold SCL low;
Clear UA = 0;
Receive Low_addr_byte;
Set interrupt;
Set UA = 1;
If (Low_byte_addr_match)
send ACK = 0;
set XMIT_MODE;
2
Set I2COV;
CBUF;
Set interrupt;
if (R/W = 1)
else if (R/W = 0) set RCV_MODE;
End of transmission;
Go back to IDLE_MODE;
{
}
2
C IN IDLE_MODE, RCV_MODE OR XMIT_MODE
PRIOR_ADDR_MATCH = TRUE;
Send ACK = 0;
while (I2CADD not updated) Hold SCL low;
Clear UA = 0;
Set RCV_MODE;
Preliminary
{
}
Send ACK = 0;
set XMIT_MODE;
1996 Microchip Technology Inc.