UPD70208HGF-12-3B9 NEC [NEC], UPD70208HGF-12-3B9 Datasheet - Page 30
UPD70208HGF-12-3B9
Manufacturer Part Number
UPD70208HGF-12-3B9
Description
V40HLTM, V50HLTM 16/8, 16-BIT MICROPROCESSOR
Manufacturer
NEC [NEC]
Datasheet
1.UPD70208HGF-12-3B9.pdf
(110 pages)
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30
9. TCU (TIMER/COUNTER UNIT)
subset of the PD71054.
9.1
9.2
IORD IOWR Note 1
Notes 1. A0 or A1 (Set by a system I/O area register)
The TCU incorporates 3 counters, and can be used as a timer, event counter, rate generator, etc. Functionally it is a
•
•
•
•
•
3
Six programmable count modes
Binary/BCD count
Multiple latch command
Choice of two input clocks: internal/external
TCU INTERNAL BLOCK DIAGRAM
FEATURES
Read/Write Control
16-bit counters
Register)
2. A1 or A2 (Set by a system I/O area register)
(Mode
TMD
Note 2
TCU
Selection
Signal
TCT #0
Status
Register
(External)
Status
Latch
(8)
(8)
TCLK
Internal Data Bus
Data Sheet U13225EJ4V0DS00
Prescaler
CLOCK
SW
H(8) L(8)
Down Counter (16)
Register
Count
(16)
(8)
Control Logic
H(8) L(8)
TCTL0=High
Count
Latch
(16)
(8)
TOUT0 (To INTL0)
SW
TCT #1
TCTL1=High
PD70208H, 70216H
TOUT1 (External) TCTL2 (External)
To INTL2/SCU
SW
TCT #2
TOUT2 (External)
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