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HMCS47C,HMCS47CL---------------------------------------------------------
•
ELECTRICAL CHARACTERISTICS - 2 (Ta =
-20
to +75°C)
Reset and Halt
Value
Unit
Item
Symbol
Test Conditions
min.
max.
Halt Duration Voltage
VOH
HLT = 0.2V
2.0
-
V
Halt Current
IOH
~Vee,
VOH=2.0V
-
12
#J,A
HLT=0.1V
Halt Delay Time
tHO
200
-
#J,s
Operation Recovery Time
tRe
200
-
#J,s
HLT Fall Time
tfHLT
-
1000
#J,s
HIT
Rise Time
trHLT
-
1000
#J,s
HLT "Low" Hold Time
tHLT
800
-
#J,s
Rf Oscillation,
HLT "High" Hold Time
tOPR
External Clock
0.2
ms
-
Operation,
Vee=2.5 to 5.5V
External Reset
RESET Pulse Width (1)
tRST1
*tf=2.5 to 5.5V
L = Voc
2
ms
Rf Oscillation,
-
External Clock
Operation
External Reset
RESET Pulse Width (2)
tRST2
~=2.5
to 5.5V
2'Tinst
-
#J,s
= Vee
RESET Fall Time
tfRST
RIT
= Vee
-
20
ms
RESET Rise Time
trRST
ALi
= Vee
-
20
ms
(NOTE) All voltages are with respect to GN O.
• SIGNAL DESCRIPTION
The input and output signals for the HMCS47C, shown in
PIN ARRANGEMENT, are described in the following para-
graphs.
•
Vee and GND
Power is supplied to the HMCS4 7C using these two pins.
Vee
is power and GND is the ground connection.
•
RESET
This pin allows resetting of the HMCS47C at times other
than the automatic resetting capability (ACL; Built-in Reset
Circuit) already in the HMCS47C. The HMCS47C can be reset
by pulling RESET high. Refer to RESET FUNCTION for addi-
tional information.
•
OSC, and OSC2
These pins provide control input for the built-in oscillator
circuit. A resistor, ceramic filter circuit, or an external oscillator
can be connected to these pins to provide a system clock with
various degrees of stability/cost tradeoffs. Lead length and stray
capacitance on these two pins should be minimized. Refer to
OSCILLATOR for recommendations about these pins.
• R[T
This pin is used to place the HMCS47C in the Halt State
(Stand-by Mode).
The HMCS47C can be moved into the Halt State by pulling
HLTlow.
In the Halt State, the internal clock stops and all the internal
statuses (the RAM, the registers, the Carry F/F, the Status
F/F, the Program Counter, and all the internal statuses) are
held.
Consequently, the power consumption is reduced. By pulling
HLT high, the HMCS47C starts operation from the state just
before the Halt State.
Refer to HALT FUNCTION for details of the Halt Mode.
•
TEST
This pin is not for user application and must be connected
to
Vee. '
•
INTo and INTI
These pins provide the capability for asynchronously apply-
ing external interrupts to the HMCS47C.
Refer to INTERRUPTS for additional information.
•
Roo - R o3 , RIO - R u , R20 - R 23 , R30 - R33 , R40 - R43 ,
Rso - RS3
These 24 lines are arranged into six 4·bit Data Input/Output
Common Channels.
The 4-bit registers (Data I/O Register) are attached to these
channels. Each channel is directly addressed by the operand of
input/output instruction. Refer to INPUT/OUTPUT for addi-
tional information.
• R60 - R63
These 4 lines are the 4-bit Data Output Channel.
114
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