Electronic Components Datasheet Search |
|
PCF84C81AT Datasheet(PDF) 5 Page - NXP Semiconductors |
|
PCF84C81AT Datasheet(HTML) 5 Page - NXP Semiconductors |
5 / 20 page 1996 Nov 20 5 Philips Semiconductors Product specification Telecom microcontrollers PCF84C21A; PCF84C41A; PCF84C81A 5 PINNING INFORMATION 5.1 Pinning Fig.2 Pin configuration. 1 2 3 4 5 6 7 8 9 10 11 12 13 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 PCF84C21A PCF84C41A PCF84C81A P2.2 SDA/P2.3 SCLK P0.0 P0.1 P0.2 P0.3 P0.4 P0.5 P0.6 P0.7 T1 VSS INT/T0 V DD P2.1 P2.0 P1.7 P1.6 P1.5 P1.4 P1.3 P1.2 P1.1 P1.0 RESET XTAL2 XTAL1 MBB562 5.2 Pin description Table 1 DIP28 and SO28 packages SYMBOL PIN FUNCTION P2.2 1 1 bit of Port 2: 4-bit quasi-bidirectional I/O port SDA/P2.3 2 bidirectional data line of the I2C-bus interface, or 1 bit of Port 2: 4-bit quasi-bidirectional I/O port SCLK 3 bidirectional clock line of the I2C-bus interface P0.0 to P0.7 4 to 11 8 bits of Port 0: 8-bit quasi-bidirectional I/O port INT/T0 12 Interrupt/Test 0 T1 13 Test 1/count input of 8-bit timer/event counter 1 VSS 14 ground XTAL1 15 crystal oscillator input or external clock input XTAL2 16 crystal oscillator output RESET 17 Reset input P1.0 to P1.7 18 to 25 8 bits of Port 1: 8-bit quasi-bidirectional I/O port P2.0 to P2.1 26 to 27 2 bits of Port 2: 4-bit quasi-bidirectional I/O port VDD 28 positive supply 6 INSTRUCTION SET ROM is restricted to 2 kbytes for the PCF84C21A and 4 kbytes for the PCF84C41A. Therefore, the instructions SEL MB1/2/3 for the PCF84C21A, and the instructions SEL MB2/3 for the PCF84C41A should be avoided, as they would define non-existing program memory banks. As RAM is limited to 64 bytes for the PCF84C21A and to 128 bytes for the PCF84C41A, care should be taken to avoid accesses to non-existing RAM locations. See the “ PCF84CxxxA family” data sheet for a complete description of the instruction set. 7 HIGH SINK OUTPUT CURRENTS The Port 1 outputs of these devices are designed for high current drive in the logic 0 state. They are capable of driving 10 mA loads and higher. Applications include drive for small relays and light-emitting diodes (LEDs). To avoid overload, care should be taken that the total Port 1 current averages less than 80 mA, i.e. an average of 10 mA per Port 1 line. Refer to Chapter “Limiting values” which specifies an upper limit of 100 mA for ISS. |
Similar Part No. - PCF84C81AT |
|
Similar Description - PCF84C81AT |
|
|
Link URL |
Privacy Policy |
ALLDATASHEET.COM |
Does ALLDATASHEET help your business so far? [ DONATE ] |
About Alldatasheet | Advertisement | Datasheet Upload | Contact us | Privacy Policy | Link Exchange | Manufacturer List All Rights Reserved©Alldatasheet.com |
Russian : Alldatasheetru.com | Korean : Alldatasheet.co.kr | Spanish : Alldatasheet.es | French : Alldatasheet.fr | Italian : Alldatasheetit.com Portuguese : Alldatasheetpt.com | Polish : Alldatasheet.pl | Vietnamese : Alldatasheet.vn Indian : Alldatasheet.in | Mexican : Alldatasheet.com.mx | British : Alldatasheet.co.uk | New Zealand : Alldatasheet.co.nz |
Family Site : ic2ic.com |
icmetro.com |