MM58167 NSC [National Semiconductor], MM58167 Datasheet - Page 6

• Manufacturer Part Number: MM58167
• Description: Microprocessor Real Time Clock
• Manufacturer: NSC [National Semiconductor]

Functional Description
Interrupt Timing
Note 1 The status register clocks are the corresponding counter’s rollover to its reset state or the compare becoming valid The compare becomes valid 61 s
after the 1 10 000 of a second counter is clocked if the real time counter data matches the RAM data
Read Cycle Timing
Note 2 When reading a deselect time of 500 ns minimum must occur between counter reads Deselect is CS
Note 3 If t
Symbol
t
t
t
t
t
t
t
t
t
t
AR
CSR
RRY
RYD
AD
RH
HZ
RYH
RA
RYDV
Symbol
t
t
t
t
INTON
SBYON
INTOFF
SBYOFF
AR
e
0 and Chip Select Address Valid or Read are coincident then they must exist for 1050 ns
Standby Interrupt
Typical Characteristics
Address Bus Valid to Read Strobe (Note 3)
Chip Select to Read Strobe (Note 2)
Read Strobe to Ready Strobe
Ready Strobe to Data Valid
Address Bus Valid to Data Valid
Data Hold Time from Trailing Edge of Read Strobe
Trailing Edge of Read Strobe to TRI-STATE Mode
Read Hold Time after Ready Strobe
Address Bus Hold Time from Trailing Edge of Read Strobe
Rising Edge of Ready to Data Valid
Status Register Clock to INTERRUPT OUTPUT
(Pin 13) High (Note 1)
Compare Valid to STANDBY INTERRUPT
(Pin 14) Low (Note 1)
Trailing Edge of Status Register
Read to INTERRUPT OUTPUT Low
Trailing Edge of Write Cycle
(D0
INTERRUPT Off (High Impedance State)
0 C
e
0 Address
s
0 C
T
A s
s
(Continued)
T
A s
70 C 4 5V
Parameter
e
Parameter
70 C 4 5V
16
H
TL F 11070–4
) to STANDBY
s
V
DD s
s
FIGURE 2
V
DD s
5 5V V
6
5 5V V
SS
e
SS
0V
e
0V
Typical Supply Current
vs Supply Voltage
during Power Down
Min
e
Min
100
50
0
0
0
1 or (WR)
Max
(RD)
5
5
5
5
1050
Max
150
800
250
100
e
1
TL F 11070 – 5
Units
Units
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
s
s
s
s