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SH7708 数据表(PDF) 30 Page - Renesas Technology Corp

部件名 SH7708
功能描述  SuperH??RISC engine
PDF  633 Pages
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制造商  RENESAS [Renesas Technology Corp]
网页  http://www.renesas.com
标志 RENESAS - Renesas Technology Corp

SH7708 数据表(HTML) 30 Page - Renesas Technology Corp

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12
Table 1.2
SH7708 Series Pin Functions (cont)
No.
Terminal
I/O
Description
122
VCC
Power
Power (3.3 V)
123
WE1/DQMLU
O
D15–D8 selection signal
124
WE0/DQMLL
O
D7–D0 selection signal
125
CASLH
O
D15–D8 selection signal
126
CASLL/CAS/OE
O
D7–D0 selection/memory selection signal
127
VSS
Power
Power (0 V)
128
VCC
Power
Power (3.3 V)
129
RAS/CE
O
RAS for DRAM, SDRAM/CE for PSRAM
130
MD5/
RAS2
I/O
Operating mode pin/RAS for DRAM
131
CKE
O
Clock enable control for SDRAM
132
WAIT
I
Hardware wait request
133
VSS
Power
Power (0 V)
134
TCLK
I/O
Clock I/O for TMU/RTC
135
VCC (RTC)*3
Power
Power (3.3 V)
136
XTAL2
O
Crystal oscillator pin for on-chip RTC
137
EXTAL2
I
Crystal oscillator pin for on-chip RTC
138
VSS (RTC)*3
Power
Power (0 V)
139
VCC
Power
Power (3.3 V)
140
D31
I/O
Data bus
141
D30
I/O
Data bus
142
D29
I/O
Data bus
143
D28
I/O
Data bus
144
VSS
Power
Power (0 V)
Notes: 1. With the SH7708S and SH7708R, except in hardware standby mode, all V
CC and VSS
pins should be connected to the system power supply (power should be supplied
constantly). In hardware standby mode, power should be supplied at least to V
CC (RTC)
and V
SS (RTC).
If power is not supplied to V
CC and VSS pins other than VCC (RTC) and
V
SS (RTC), hold the CA pin low.
With the SH7708, it is not possible to supply power
only to the RTC power supply.
2. Power should be supplied regardless of whether or not the on-chip PLL is used.
3. Power should be supplied regardless of whether or not the RTC is used.



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