µPD75216A
5.8 FIP CONTROLLER/DRIVER
The on-chip FIP controller/driver has the following functions:
•
Generates the segment and digit signals by automatically reading the display data memory executing DMA
operation.
•
•
•
•
Can select up to a total of 26 display devices in the range of 9 to 16 segments and 9 to 16 digits.
Can apply the remaining display output as static output.
Can adjust the brightness at 8 levels using the dimmer function.
Can apply key scan operations.
•
•
Generates interrupt at the key scan timing (IRQKS)
Can generate key scan data output from the segment output pin.
•
•
Owns the high-voltage output pin (40 V) which can directly drive the FIP.
•
•
Segment special pins (S0 to S9)
: VOD = 40 V, IOD = 3 mA
Digit output pins (T0 to T15) : VOD = 40 V, IOD = 15 mA
Can incorporate pull-down resistors bit-wise as mask options.
Differences between µPD75261A and µPD75238 display output function are shown in Table 5-2.
Table 5-2 Differences between µPD75216A and µPD75238 display output function
µPD75216A
µPD75238
High-voltage output display
FIP output total
Segment output
Digit output
:
:
:
26
FIP output total
Segment output
Digit output
:
:
:
34
9 to 16
9 to 16
9 to 24
9 to 16
Display data area
1C0H to 1FFH
1A0H to 1FFH
Output dual-function pin
S12 to S15
(PORTH)
S0 to S23
(PORT10 to PORT15)
KS0 to KS2
Key scan register
KS0, KS1
25
NEC [ NEC ]
