upd75212a Renesas Electronics Corporation., upd75212a Datasheet - Page 26

• Manufacturer Part Number: upd75212a
• Description: 4-bit Single-chip Microcomputer
• Manufacturer: Renesas Electronics Corporation.

26
Note
The FIP controller/driver can only operate in the high and intermediate-speeds (PCC = 0011B or
0010B) of the main system clock (SCC.0 = 0). It may cause errors with any other clock or in the
standby mode. Thus, be sure to stop FIP controller operation (DSPM.3 = 0) and then shift the unit
to any other clock mode or the standby mode.
Key Scan Registers (KS0, KS1)
Segment Data Latch (16)
S0-S9
10
10
Display Data Memory
12
(64
4 Bits)
Fig. 5-8 FIP Controller/Driver Block Diagram
High-Voltage Output Buffer
T15/S10,
T14/S11
2
2
2
2
T13/S12/PH0-
T10/S15/PH3
4
4
Internal Bus
Selector
Selector
Port H
4
4
4
4
4
Display
Mode
Register
4
T0-T9
Digit
Select
Register
10
10
Digit Signal
Generator
4
Dimmer
Select
Register
4
V
LOAD
Key Scan
Flag (KSF)
V
PRE
PD75212A
Generation
IRQKS
INTKS
Signal