CDP1879 データシートの表示（PDF） - Intersil
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CDP1879 Datasheet PDF : 18 Pages
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CDP1879, CDP1879C-1
TPA
RD
N LINES
TPB/WR
DATA LATCHED
DATA FROM MEMORY
TO REAL-TIME CLOCK
VALID DATA
FIGURE 15. CDP1800 SERIES INPUT/OUTPUT MAPPING TIMING WAVEFORMS WITH OUTPUT INSTRUCTION
TPA
OUTPUT DRIVERS ENABLED
RD
TPB/WR
OUTPUT DRIVERS
DISABLED
N LINES
DATA FROM
REAL-TIME CLOCK
TO MEMORY
VALID DATA
FIGURE 16. CDP1800 SERIES INPUT/OUTPUT MAPPING TIMING WAVEFORMS WITH INPUT INSTRUCTION
Dynamic Electrical Specifications at TA -40oC to +85oC, Input tR, tF = 10ns, CL = 50pF
LIMITS
CDP1879
CDP1879C-1
PARAMETER
VDD
(NOTE 1)
(NOTE 1)
(V)
MIN
MAX
MIN
MAX
Read Cycle Times (See Figure 17)
Data Access from Address
tDA
5
-
400
-
400
10
-
190
-
-
Read Pulse Width
tRD
5
270
-
270
-
10
160
-
-
-
Data Access from Read
tDR
5
-
375
-
375
10
-
170
-
-
Address Hold after Read
tRH
5
0
-
0
-
10
0
-
-
-
Output Hold after Read
tDH
5
50
230
50
230
10
40
130
-
-
Chip Select Setup to TPA
tCS
5
50
-
50
-
10
30
-
-
-
NOTE:
1. Time required by a limit device to allow for the indicated function.
UNITS
ns
4-119
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