R1610C RDC Semiconductor, R1610C Datasheet - Page 13

• 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
● 16550 UART
Data Sheet
Final Version 1.5
October 27, 2003
R
DMA Unit Interface
PIN No.
D
D
11
12
13
14
15
16
17
19
20
21
22
24
C
C
®
®
DRQ1/INT6/PIO13
DRQ0/INT5/PIO12
TMROUT0/PIO10
TMROUT1/PIO1
DCD0_n/SAD15
DTR0_n/SAD12
DSR0_n/SAD11
SOUT0/SAD13
RTS0_n/SAD9
CTS0_n/SAD8
RI0_n /SAD10
R
R
SIN0/SAD14
I
I
S
S
C
C
Symbol
D
D
S
S
P
P
C
C
o
o
m
m
m
m
u
u
n
n
i
i
c
c
a
a
t
t
i
i
o
o
n
n
I/O/PD*
I/O/PU*
I/O/PU
I/O/PU
I/O/PU
I/O/PU
I/O/PU
I/O/PU
I/O/PU
I/O/PU
Type
Timer output. Depending on timer mode select. These pins
provide single pulse or continuous waveform. The duty cycle of
the waveform is programmable. These pins are floated during a
bus hold or reset.
DMA request. These pins are asserted high by an external
device when the device is ready for DMA channel 1 or channel 0
to perform a transfer. These pins are level-triggered and
internally synchronized. The DRQ signals are not latched and
must remain active until serviced.
For INT6/INT5: When the DMA function is not used, the INT6
and INT5 can be used as an additional external interrupt
request. And they share the corresponding interrupt type and
register control bits. The INT6/5 are level-triggered only and
must be held until the interrupt is acknowledged.
SIN0: Serial Input. Serial Data Input from the communications
link.
SAD14: The combination pin with Address and Data. It is for
slower device bus.
SOUT0: Serial Output. Composite serial data output to the
communications link.
SAD13: The combination pin with Address and Data. It is for
slower device bus.
RTS0_n: Request To Send. When low, this indicates to MODEM
or data set that URAT is ready to exchange data.
SAD9: The combination pin with Address and Data. It is for
slower device bus.
DTR0_n: Data Terminal Ready. When low, this informs the
MODEM or data set that UART is ready to establish a
communication link.
SAD12: The combination pin with Address and Data. It is for
slower device bus.
CTS0_n: Clear To Send. When low, this indicates to UART that
MODEM or data set is ready to exchange data.
SAD8: The combination pin with Address and Data. It is for
slower device bus.
DSR0_n: Data Set Ready. When low, this indicates that
MODEM or data set is ready to establish the communication link
with UART.
SAD11: The combination pin with Address and Data. It is for
slower device bus.
DCD0_n: Data Carry Detection. When low, it indicates that the
data carrier has been detected by the MODEM or data set.
SAD15: The combination pin with Address and Data. It is for
slower device bus.
RI0_n: Ring Indicator. This indicates that a telephone ringing
signal has been received by the MODEM or data set.
Fast Ethernet RISC Processor
Description
R1610C
13