參數(shù)資料
型號: AS80196CA
廠商: Intel Corp.
英文描述: ADVANCED 16-BIT CHMOS MICROCONTROLLER WITH INTEGRATED CAN 2.0
中文描述: 先進的16位單片機CHMOS集成CAN 2.0
文件頁數(shù): 9/33頁
文件大?。?/td> 453K
代理商: AS80196CA
87C196CA/87C196CB
Symbol
Name and Function
PORT 3 and 4
8-bit bidirectional I/O ports with open drain outputs. These pins are shared with the
multiplexed address/data bus which has strong internal pullups.
P2.7/CLKOUT
Output of the internal clock generator. The frequency is the oscillator frequency.
CLKOUT has a 50% duty cycle. Also LSIO pin when not used as CLKOUT.
P2.6/HLDA
Y
Bus Hold Acknowledge. Active-low output indicates that the bus controller has
relinquished control of the bus. Occurs in response to an external device asserting the
HLD
Y
signal. Also LSIO when not used as HLDA
Y
.
P2.5/HLD
Y
(CB only)
Bus Hold. Active-low signal indictes that an external device is requesting control of the
bus. Also LSIO when not used as HLD
Y
.
P2.4/INTOUT
Y
Interrupt Output. This active-low output indicates that a pending interrupt requires use
of the external bus. Also LSIO when not used as INTOUT
Y
P2.3/BREQ
Y
(CB only)
Bus Request. This active-low output signal is asserted during a HOLD cycle when the
bus controller has a pending external memory cycle. Also LSIO when not used as
BREQ
Y
P2.2/EXTINT
A positive transition on this pin causes a maskable interrupt vector through memory
location 203CH. Also LSIO when not used as EXTINT.
P2.1/RXD
Receive data input pin for the Serial I/O port. Also LSIO if not used as RXD.
P2.0/TXD
Transmit data output pin for the Serial I/O port. Also LSIO if not used as TXD.
PORT 1/EPA0–7
Dual function I/O port pins. Primary function is that of bidirectional I/O. System function
is that of High Speed capture and compare. EPA0 and EPA2 have another function of
T2CLK and T2DIR of the TIMER2 timer/counter.
PORT 0/ACH0–7
8-bit high impedance input-only port. These pins can be used as digital inputs and/or as
analog inputs to the on-chip A/D converter. These pins are also used as inputs to
EPROM parts to select the Programming Mode.
EPORT
(CB only)
8-bit bidirectional standard and I/O Port. These bits are shared with the extended
address bus, A16–A19 for CB PLCC, A16–A23 for CB QFP. Pin function is selected on
a per pin basis.
TXCAN
Push-pull output to the CAN bus line.
RXCAN
High impedance input-only from the CAN bus line.
9
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