FO-2970MU
5 – 3
(Continuing)
Classification
Code
Terminal No.
I/O
Name
Function
Power
Vcc
12,26,40,
I
Power
Connect Vcc terminals with the power source for all systems.
63,77,85,
If any open terminal remained, operation is impossible.
99,112,135
Vss
6,14,28,
I
Ground
Connect to the ground.
35,42,55,
Connect Vss terminals with the ground for all systems.
61,71,79,
If any open terminal remained, operation is impossible.
87,93,117,
129,141
Vpp
I
Program power source
Connected with the power source (Vcc) for normal operation.
In case of PROM mode, apply 12.5 V.
Clock
PLL Vcc
104
I
PLL power
Power source for the built-in PLL oscillator.
PLL Vss
106
I
PLL ground
Ground for the built-in PLL oscillator.
PLLCAP
105
I
PLL capacity
External capacity terminal for the built-in PLL oscillator.
EXTAL
96
I
External clock
Connected with the crystal oscillator. By EXTAL terminal the external
clock can be input.
XTAL
94
I
Crystal
Connected with the crystal oscillator.
CK
107
O
System clock
Supplied to peripheral devices.
System control
RES
108
I
Power-on-reset
When impressing low level onto this terminal, power-on-reset
condition is attained.
MRES
144
I
Manual reset
When applying low level to this terminal, manual reset condition
is obtained.
WDTOVF
44
O
Watch dog timer
Overflow output signal from WDT.
overflow
BREQ
33,38
I
Bus right demand
Low level obtained when external device demands to release
the bus right.
BACK
30,37
O
Bus right demand
Shows that the bus right has been released to the external device.
acknowledge
The device outputting signal BREQ can acknowledge the pass
right gained by receiving signal BACK.
Operation
MD0~
95,97
I
Mode setting
The terminal to determine operation modes.
mode control
MD3
102,103
Do not change the input value during operation.
Interrupt
NMI
98
I
Non-maskable
Non-maskable interruption demand terminal. Receiving on either
interrupt
leading edge or trailing edge can be selected.
IRQ0 ~
31,32,34
I
Interruption demand
Maskable interruption demand terminal. Level input and edge
IRQ7
37~39
0 to 7
input can be selected.
41,51,52
64~69
70,72
132,136
IRQOUT
5,46
O
Interruption demand
Shows that the interrupt factor has occurred.
output
During bus release, interrupt occurred can be known.
Address bus
A0~A21
7~11,13,
O
Address bus
Outputs address.
15~24,25,
27,29,30,
37~39,41
SH7041 (IC5) Terminal descriptions
Summary of Contents for FO-2970M
Page 70: ...FO 2970MU 6 10 Control PWB parts layout Top side ...
Page 71: ...FO 2970MU Control PWB parts layout Bottom side 6 11 ...
Page 73: ...FO 2970MU 6 13 TEL LIU and Hook SW PWB parts layout Top side ...
Page 74: ...FO 2970MU 6 14 TEL LIU and Hook SW PWB parts layout Bottom side ...
