UPD75238GJ NEC [NEC], UPD75238GJ Datasheet - Page 121

• Manufacturer Part Number: UPD75238GJ
• Description: 4 BIT SINGLE-CHIP MICROCOMPUTER
• Manufacturer: NEC [NEC]

(2) FIP controller/driver functions
(3) Difference of the display output function between the PD75238, PD75216A, and PD75217
Table 4-8 Difference of the Display Output Function between the PD75238, PD75216A, and PD75217
The FIP controller/driver contained in the PD75238 has the following functions:
(a) The FIP controller/driver automatically reads display data and generates a segment signal (DMA
(b) An FIP having 9 to 24 segments and 9 to 16 digits can be controlled with the display mode register
(c) Any outputs not used for dynamic display can be used as static outputs or output ports.
(d) The dimmer function provides eight levels of intensity.
(e) Hardware that makes key scan application possible
(f) A high-voltage output pin (40 V) is provided which can directly drive the FIP.
(g) Mask options for display output pins
Table 4-8 shows the difference of the display output function between the PD75238, PD75216A, and
PD75217.
operation) and a digit signal.
(DSPM), digit select register (DIGS), static mode register A (STATA), and static mode register B
(STATB). (Up to 34 display outputs are allowed.)
• An interrupt (IRQKS) is caused for key scanning (detection of key scan timing).
• Key scan data can be output on a segment output with key scan buffers (KS0, KS1, and KS2).
• Segment output pins (S0 to S9, S16 to S23): V
• Digit output pins (T0 to T15): V
• A pull-down resistor to V
• A pull-down resistor to V
be selected in 8-bit units.
High-voltage output display
Display data area
Output dual-function pin
Key scan register
LOAD
LOAD
or V
FIP output total : 34
Segment output : 9 - 24
Digit output
1A0H-1FFH
S0-S23 (Port 10-port 15)
KS0-KS2
can be incorporated bit by bit for T0 to T9 and S0 to S15.
OD
SS
= 40 V, I
can be incorporated bit by bit for S16 to S23. V
PD75238
OD
: 9 - 16
= 15 mA
OD
= 40 V, I
FIP output total : 26
Segment output : 9 - 16
Digit output
1C0H-1FFH
S12-S15 (Port H)
KS0, KS1
OD
= 3 mA
PD75216A, PD75217
: 9 - 16
LOAD
PD75238
or V
SS
must
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