UPD75218 NEC, UPD75218 Datasheet - Page 21

• Manufacturer Part Number: UPD75218
• Description: 4-BIT SINGLE-CHIP MICROCOMPUTER
• Manufacturer: NEC

Note
5.7
a serial bus and coupling with peripheral devices.
The serial interface has the following functions:
• Clock synchronous 8-bit send/receive operation (simultaneous send/receive)
• Clock synchronous 8-bit serial bus operation (data input/output from the SO pin. N-ch open-drain SO output)
• Start LSB/MSB switching
These functions facilitate data communication with another microcomputer of PD7500 series or 78K series via
f
Frequency divider
X
TPGM3
TPGM1
SERIAL INTERFACE
7.81 ms when the microcomputer operates at 4.19 MHz.
1/2
Fig. 5-6 Timer/Pulse Generator Block Diagram (PWM Pulse Generation Mode)
Modulo register H (8)
MODH (8)
8
PWM pulse generator
Modulo latch (14)
(IRQTPG set signal)
MODH
INTTPG
(
2
f
15
X
Internal bus
Modulo register L (8)
= 5.46 ms : when f
MODL
7-2
8
(6)
X
MODL
is 6.0 MHz)
(2)
Selector
TPGM5
Note
Output buffer
TPGM7
PD75218
PPO
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