R1610C RDC Semiconductor, R1610C Datasheet - Page 71

• Manufacturer Part Number: R1610C
• Description: High Performance 16 Bits MCU Integrated One 10/100M Mac Controller - 3.3V Operating Voltage/2.5V Core Voltage
• Manufacturer: RDC Semiconductor

R
Data Sheet
Final Version 1.5
October 27, 2003
R
7-0
D
D
C
C
COUNT
®
®
R
R
I
I
S
S
C
C
D
D
S
S
P
P
C
C
R/W
o
o
m
m
m
m
u
u
n
n
i
i
c
c
a
a
t
t
i
i
o
o
n
n
Timeout Count. The COUNT setting determines the duration of the watchdog
timer timeout interval.
Frequency\
Exponent
100 MHz
75 MHz
Duration =
a. The duration equation: Duration =(
b. The Exponent of the COUNT setting:
c. Watchdog timer Duration reference table:
For example: System clock =100Mhz and frequency exponent=10,
(Bit 7, Bit 6, Bit 5, Bit 4, Bit 3, Bit 2, Bit 1, Bit 0) = (Exponent)
( 0 , 0 , 0 , 0, 0 , 0 , 0 , 0 ) = (N/A)
( x , x , x , x, x , x , x , 1) = ( 10 )
( x , x , x , x, x , x , 1 , 0 ) = ( 20 )
( x , x , x , x, x , 1 , 0 , 0 ) = ( 21 )
( x , x , x , x, 1 , 0 , 0 , 0 ) = ( 22 )
( x , x , x , 1, 0 , 0 , 0 , 0 ) = ( 23 )
( x , x , 1 , 0, 0 , 0 , 0 , 0 ) = ( 24 )
( x , 1 , 0 , 0, 0 , 0 , 0 , 0 ) = ( 25 )
( 1 , 0 , 0 , 0, 0 , 0 , 0 , 0 ) = ( 26 )
27.3 us 28 ms 55.9 ms 111.8 ms 223.7 ms 447.4 ms 894.8 ms 1.79 s
20.5 us 21 ms 41.9 ms 83.9 ms 167.8 ms 335.5 ms 671 ms
then
10
2
20
10
/ ( 100Mhz / 2 ) = 2048 / 100Mhz = 20.48 us
21
22
Fast Ethernet RISC Processor
2
23
Exponent
) / (Frequency/2)
24
R1610C
25
1.34 s
26
71