7480 Datasheet, PDF (48/98 Pages) Bi technologies – 7/8 Diameter 5-Turn Wirewound Precision Potentiometer

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MITSUBISHI MICROCOMPUTERS
7480/7481 GROUP
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
EPROM MODE
The built-in programmable ROM has the EPROM mode in addition
_____
to its normal operation modes. When the RESET level becomes
“L”, the chip automatically enters the EPROM mode. Table 6
shows a list of correspondence between pins and Figure 50 to Fig-
ure 52 show pin connection diagrams. In this status, each of ports
P0, P11 to P17, P20 to P23, P3, P40, P41 and VREF are used for
the PROM (equivalent to M5M27C256K). In this mode, the built-in
PROM can be written to or read from using these pins in the same
way as with the M5M27C256K. The clock should be connected to
XIN and XOUT pins.
Table 6. Correspondence between pins in EPROM mode
VCC
VPP
VSS
Address input
Data I/O
__
CE
__
OE
M37480E8, M37481E8
VCC
P33
VSS
Ports
P11 – P17,
P20 – P23, P30,
P31, P40, P41
Port P0
VREF
P32
M5M27C256K
VCC
VPP
VSS
A0 – A14
D0_{_–_D}7
CE
__
OE
P53
1
A10
P17/SRDY
2
A9
P16/SCLK
3
A8
P15/TXD
4
A7
P14/RXD
5
A6
P13/T1
6
A5
P12/T0
7
A4
P11
8
P10
9
P27/IN7
10
P26/IN6
11
P25/IN5
12
P24/IN4
13
A3
P23/IN3
14
A2
P22/IN2
15
A1
P21/IN1
16
A0
P20/IN0
17
CE
VREF
18
XIN
19
XOUT
20
VSS
VSS
21
42
P52
41
P07
40
P06
39
P05
38
P04
37
P03
36
P02
35
P01
34
P00
33
P43
32
P42
31
P41/CNTR1
30
P40/CNTR0
29
P33
28
P32
27
P31/INT1
26
P30/INT0
25
RESET
24
P51
23
P50
22
VCC
Outline 42P4B
42S1B-A (M37481E8SS)
: PROM pin (equivalent to M5M27C256K)
Fig. 50 Pin connection in EPROM mode (1)
D7
D6
D5
D4
D3
D2
D1
D0
A14
A13
VPP
OE
A12
A11
VCC
VSS
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