PIC16C74/JW Microchip Technology, PIC16C74/JW Datasheet - Page 98

• Manufacturer Part Number: PIC16C74/JW
• Description: MICRO CTRL 4K 20MHZ EPROM 40CDIP
• Manufacturer: Microchip Technology
• Series: PIC® 16Cr

Specifications of PIC16C74/JW

• Core Processor: PIC
• Core Size: 8-Bit
• Speed: 20MHz
• Connectivity: I²C, SPI, UART/USART
• Peripherals: POR, PWM, WDT
• Number Of I /o: 33
• Program Memory Size: 7KB (4K x 14)
• Program Memory Type: EPROM, UV
• Ram Size: 192 x 8
• Voltage - Supply (vcc/vdd): 4 V ~ 6 V
• Data Converters: A/D 8x8b
• Oscillator Type: External
• Operating Temperature: 0°C ~ 70°C
• Package / Case: 40-CDIP (0.600", 15.24mm) Window
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Eeprom Size: -

PIC16C7X
FIGURE 11-27: OPERATION OF THE I
DS30390E-page 98
IDLE_MODE (7-bit):
if (Addr_match)
RCV_MODE:
if ((SSPBUF=Full) OR (SSPOV = 1))
else
Receive 8-bits in SSPSR;
Set interrupt;
XMIT_MODE:
While ((SSPBUF = 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 SSPOV;
Do not acknowledge;
send ACK = 0;
Set interrupt;
if ((SSPBUF = Full) OR ((SSPOV = 1))
else
if (PRIOR_ADDR_MATCH)
transfer SSPSR
PRIOR_ADDR_MATCH = FALSE;
{
}
{
}
{
}
{
}
{
}
Do not acknowledge;
Set UA = 1;
Send ACK = 0;
While (SSPADD 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;
Set SSPOV;
SSPBUF;
Set interrupt;
if (R/W = 1)
else if (R/W = 0) set RCV_MODE;
End of transmission;
Go back to IDLE_MODE;
{
}
2
C MODULE IN IDLE_MODE, RCV_MODE OR XMIT_MODE
PRIOR_ADDR_MATCH = TRUE;
Send ACK = 0;
while (SSPADD not updated) Hold SCL low;
Clear UA = 0;
Set RCV_MODE;
72 73 73A 74 74A 76 77
Applicable Devices
{
}
Send ACK = 0;
set XMIT_MODE;
1997 Microchip Technology Inc.