Electronic Components Datasheet Search |
|
S87C196MC Datasheet(PDF) 7 Page - Intel Corporation |
|
S87C196MC Datasheet(HTML) 7 Page - Intel Corporation |
7 / 22 page 8XC196MC PIN DESCRIPTIONS (Alphabetically Ordered) Symbol Function ACH0 – ACH12 Analog inputs to the on-chip AD converter ACH0 – 7 share the input pins (P00 – P07 P10 – P14) with P00 – 7 and ACH8 – 12 share pins with P10 – 4 If the AD is not used the port pins can be used as standard input ports ANGND Reference ground for the AD converter Must be held at nominally the same potential as VSS ALEADV(P50) Address Latch Enable or Address Valid output as selected by CCR Both options allow a latch to demultiplex the addressdata bus on the signal’s falling edge When the pin is ADV it goes inactive (high) at the end of the bus cycle ALEADV is active only during external memory accesses Can be used as standard IO when not used as ALEADV BHE WRH (P55) Byte High Enable or Write High output as selected by the CCR BHE will go low for external writes to the high byte of the data bus WRH will go low for external writes where an odd byte is being written BHE WRH is activated only during external memory writes BUSWIDTH (P57) Input for bus width selection If CCR bits 1 and 2 e 1 this pin dynamically controls the bus width of the bus cycle in progress If BUSWIDTH is low an 8-bit cycle occurs If it is high a 16-bit cycle occurs This pin can be used as standard IO when not used as BUSWIDTH CAPCOMP0 – CAPCOMP3 The EPA CaptureCompare pins These pins share P20 – P23 If not used (P20 – P23) for the EPA they can be configured as standard IO pins CLKOUT Output of the internal clock generator The frequency is of the oscillator frequency It has a 50% duty cycle COMPARE0 – COMPARE3 The EPA Compare pins These pins share P24 – P27 If not used for the (P24 – P27) EPA they can be configured as standard IO pins EA External Access enable pin EA e 0 causes all memory accesses to be external to the chip EA e 1 causes memory accesses from location 2000H to 5FFFH to be from the on-chip OTPROMQROM EA e 125V causes execution to begin in the programming mode EA is latched at reset EXTINT A programmable input on this pin causes a maskable interrupt vector through memory location 203CH The input may be selected to be a positivenegative edge or a highlow level using WG PROTECT (1FCEH) INST (P51) INST is high during the instruction fetch from the external memory and throughout the bus cycle It is low otherwise This pin can be configured as standard IO if not used as INST NMI A positive transition on this pin causes a non-maskable interrupt which vectors to memory location 203EH If not used it should be tied to VSS May be used by Intel Evaluation boards PORT0 8-bit high impedance input-only port Also used as AD converter inputs Port0 pins should not be left floating These pins also used to select programming modes in the OTPROM devices PORT1 5-bit high impedance input-only port P10 – P14 are also used as AD converter inputs In addition P12 and P13 can be used as Timer 1 clock input and direction select respectively PORT2 8-bit bidirectional IO port All of the Port2 pins are shared with the EPA IO pins (CAPCOMP0 – 3 and COMPARE0 – 3) PORT3 8-bit bidirectional IO ports with open drain outputs These pins are shared PORT4 with the multiplexed addressdata bus which uses strong internal pullups PORT5 8-bit bidirectional IO port 7 of the pins are shared with bus control signals (ALE INST WR RD BHE READY BUSWIDTH) Can be used as standard IO 7 |
Similar Part No. - S87C196MC |
|
Similar Description - S87C196MC |
|
|
Link URL |
Privacy Policy |
ALLDATASHEET.NET |
Does ALLDATASHEET help your business so far? [ DONATE ] |
About Alldatasheet | Advertisement | 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 |