參數(shù)資料
型號(hào)： UPD77114
廠商： NEC Corp.
英文描述： MOS INTEGRATED CIRCUIT
中文描述： 馬鞍山集成電路
文件頁(yè)數(shù)： 11/62頁(yè)
文件大小： 352K
代理商： UPD77114
Data Sheet U14373EJ3V0DS
11
μ
PD77113A, 77114
External data memory interface (
μ
PD77114 only)
Pin No.
Pin Name
100-pin TQFP
80-pin BGA
I/O
Function
Shared by:
X/Y
99
Output
(3S)
Memory select signal output.
0: Uses X memory.
1: Uses Y memory.
DA0 - DA12
16 - 4
Output
(3S)
Address bus of external data memory.
Accesses the external memory.
Continuously outputs the external memory
address accessed last when the external
memory is not being accessed. Kept low
(0x000) if the external memory is never
accessed after reset.
D0 - D15
34 - 27, 24 - 17
I/O
(3S)
16-bit data bus.
Accesses the external memory.
MRD
97
Output
(3S)
Read output
External memory read
MWR
96
Output
(3S)
Write output
External memory write
HOLDRQ
92
Input
Hold request signal
Input a low level to this pin when the external
device uses the external data memory bus of
the
μ
PD77114.
BSTB
94
Output
Bus strobe signal
This pin goes low when the
μ
PD77114 uses
the external data memory bus.
HOLDAK
93
Output
Hold acknowledge signal
This pin goes low when the external device
is enabled to use the external data memory
bus of the
μ
PD77114.
Remark
Pins marked “3S” under the heading “I/O” go into a high-impedance state in the following conditions:
X/Y, DA0-DA12, MRD, MWR: When the bus is released (HOLDAK = low level)
D0-D15: When the external data memory is not being accessed and when the bus is released
(HOLDAK = low level)
相關(guān)PDF資料
PDF描述
UPD7720AC QUARTERLY MICROPROCESSOR/MICROCOMPUTER RELIABILITY REPORT
UPD77210 16-BIT FIXED-POINT DIGITAL SIGNAL PROCESSOR
UPD77210F1-DA2 16-BIT FIXED-POINT DIGITAL SIGNAL PROCESSOR
UPD77210GJ-8EN 16-BIT FIXED-POINT DIGITAL SIGNAL PROCESSOR
UPD77213F1-xxx-DA2 16-BIT FIXED-POINT DIGITAL SIGNAL PROCESSOR
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
UPD7759C 制造商: 功能描述: 制造商:undefined 功能描述: 制造商:Panasonic Industrial Company 功能描述:IC
UPD780023AGB-G43-8EU-X3-A 制造商:Renesas Electronics Corporation 功能描述:
UPD780023AGB-G44-8EU-E3-A 制造商:Renesas Electronics Corporation 功能描述:
UPD780023AGC-107-8BS-A 制造商:Renesas Electronics Corporation 功能描述:NECUPD780023AGC-107-8BS-A MASK ROM DEVIC
UPD780023AGK-C74-9ET-A 制造商:Renesas Electronics Corporation 功能描述:
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。

采購(gòu)需求

(若只采購(gòu)一條型號(hào)，填寫一行即可)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

*型號(hào) *數(shù)量 廠商 批號(hào) 封裝
添加更多采購(gòu)

我的聯(lián)系方式

*
*
*