upd75238 Renesas Electronics Corporation., upd75238 Datasheet - Page 122
upd75238
Manufacturer Part Number
upd75238
Description
4 Bit Single-chip Microcomputer
Manufacturer
Renesas Electronics Corporation.
Datasheet
1.UPD75238.pdf
(190 pages)
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122
N
T
T
T
Notes 1. 244 s at 4.19 MHz
Key scan
flag (KSF)
Segment
data
DSP
CYT
DIG
: Value set in the digit select register
: One display cycle (1024/f
: Display cycle (T
: Digit signal pulse width, which can be selected from eight levels with the dimmer select register
TN
T0
T1
T2
2. 489 s at 4.19 MHz
1 display
cycle
T
DSP
CYT
= T
Fig. 4-69 FIP Controller Operation Timing
DSP
X
: 171 s at 6.0 MHz
T
(N + 2))
CYT
IRQKS generation
T
DIG
Key scan timing
Note 1
T
or 2048/f
KS
Changeable
at any time
X
: 341 s at 6.0 MHz
Note 2
)
PD75238
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