DataSheet.in

UPD7801 डेटा पत्रक PDF( Datasheet डाउनलोड )


डेटा पत्रक - HIGH END SINGLE CHIP 8-BIT MICROCOMPUTER - NEC

भाग संख्या UPD7801
समारोह HIGH END SINGLE CHIP 8-BIT MICROCOMPUTER
मैन्युफैक्चरर्स NEC 
लोगो NEC लोगो 
पूर्व दर्शन
1 Page
		
<?=UPD7801?> डेटा पत्रक पीडीएफ

UPD7801 pdf
}LPD7801
PIN NO.
1,49-63
2
DESIGNATION
ABO-AB15
EXT
3·10 DBO-DB7
11 INTO
12 INT1
13 INT2
14 WAIT
15 M1
16 WR
17 RD
18·25
26
PCO-PC7
SCK
27 SI
28 SO
29 RESET
30 STB
31
33·40
41·48
Xl
PAO·PA7
PBO·PB7
FUNCTION
(Tri·State, Output) 16-bit address bus.
(Output) EXT is used to simulate J,lPD7801/7802
external memory reference operation. EXT distin·
guishes between internal and external memory
references, and goes low when locations 4096
through 65407 are accessed.
(Tri-State Input/Output, active high) 8-bit true
bi-directional data bus used for external data
exchanges with I/O and memory.
(Input, active high) Level·sensitive interrupt input.
(Input, active high) Rising·edge sensitive interrupt
input. Interrupts are initiated on low-to·high transi-
tions, providing interrupts are enabled.
(Input) INT2 is an edge sensitive interrupt input
where the desired activation transition is pro·
grammable. By setting the ES bit in the Mask
Register to a 1, INT2 is rising edge sensitive. When
ES is set to 0, INT2 is falling edge sensitive.
(Input, active low) WAIT, when active, extends
read or write timing to interface with slower
external memory or I/O. WAIT is sampled at
the end of T2, if active processor enters a wait
state TW and remains in that state as long as
WAIT is active.
(Output, active high) when active, M1 indicates
that the current machine cycle is an OP CODE
FETCH.
(Tri·State Output, active low) WR, when active,
indicates that the data bus holds valid data. Used
as a strobe ~al for external memory or I/O write
operations. WR goes to the high impedance state
during HALT, HOLD, or RESET.
(Tri·State Output, active low) RTI is used as a
strobe to ~e data from external devices onto the
data bus. RD goes to the high impedance state
during HALT, HOLD, and RESET.
(Input/Output) 8·bit I/O configured as a nibble
I/O port or as control lines.
(I nput/Output) SCK provides control clocks for
Serial Port Input/Output operations. Data on the
SI line is clocked into the Serial Register on the ris·
ing edge. Contents of the Serial Register is clocked
onto SO line on falling edges.
(Input) Serial data is input to the processor
through the SI line. Data is clocked into the Serial
Register MSB to LSB with the rising edge of SCK.
(Output) SO is the Serial Output Port. Serial data
is output on this line on the falling edge of SCK,
MSB to LSB.
(I nput, active low) RESET initializes the J,lPD7801.
(Output) Used to simulate J,lPD7801 Port E opera·
tion, indicating that aPort E operation is being
performed when active.
(I nput) Clock Input
(Output) 8-bit output port with latch capability.
(Tri·State Input/Output) 8·bit programmable I/O
port. Each line configurable independently as an
input or output.
PIN DESCRIPTION
252

विन्यास 25 पेज
डाउनलोड[ UPD7801 Datasheet.PDF ]


शेयर लिंक


अनुशंसा डेटापत्रक

भाग संख्याविवरणविनिर्माण
UPD7808-BIT N-CHANNEL MICROPROCESSORNEC
NEC
UPD780-18-BIT N-CHANNEL MICROPROCESSORNEC
NEC


भाग संख्याविवरणविनिर्माण
30L120CTSchottky RectifierPFC Device
PFC Device
AT28C010-12DKSpace 1-MBit (128K x 8) Paged Parallel EEPROMATMEL
ATMEL
B20NM50FDN-CHANNEL POWER MOSFETSTMicroelectronics
STMicroelectronics
D8442SD844SavantIC
SavantIC
FAE391-A20AM/FM Automotive Electronic TunerMitsumi
Mitsumi


Index : 0  1  2  3  4  5  6  7  8  9  A  B  C  D  E  F  G  H  I  J  K  L  M  N  O  P  Q  R  S  T  U  V  W  X  Y  Z



www.DataSheet.in    |   2017   |  संपर्क   |   खोज     |   English