ia186es Innovasic Semiconductor Inc., ia186es Datasheet - Page 84

• Manufacturer Part Number: ia186es
• Description: 8-bit/16-bit Microcontrollers
• Manufacturer: Innovasic Semiconductor Inc.

IA186ES/IA188ES
8-Bit/16-Bit Microcontrollers
5.1.26 SP0CT (080h) and SP1CT (010h)
Serial Port ConTrol Registers. These registers control both transmit and receive parts of the
respective serial ports. The value of the SP0CT and SP1CT registers is 0000h at reset (see
Table 42).
Table 42. Serial Port Control Registers
15
DMA
14
Note: This bit should be reset by software.
Note: This bit should be reset by software.
Note: This bit should be reset by software.
Bit [6]—THRE Transmit Holding Register Empty → When this bit is 1, it indicates that
the corresponding transmit holding register is ready to accept data. This is a read-only
bit.
Bit [5]—FER Framing Error Detected → When the receiver samples the rxd line as low
when a stop bit is expected (line high), a framing error is generated setting this bit.
Bit [4]—OER Overrun Error Detected → When new data overwrites valid data in the
receive register (because it has not been read), an overrun error is detected setting this bit.
Bit [3]—PER Parity Error Detected → When a parity error is detected in either mode 1
or 3, this bit is set.
Bit [2]—TEMT Transmitter Empty → When both the transmit shift register and the
transmit register are empty, this bit is set indicating to software that it is safe to disable
the transmitter. This bit is read-only.
Bit [1]—HS0 Handshake Signal 0 → This bit is the inverted value of cts_n and is read
only.
Bit [0]—RES Reserved.
Bits [15–13]—DMA DMA Control Field → These bits set up the respective ports for use
with DMA transfers as shown below.
13
RSIE
12
®
BRK
11
TB8
10
FC
9
UNCONTROLLED WHEN PRINTED OR COPIED
TXIE
8
Page 84 of 154
IA211050902-15
RXIE
7
TMODE
6
RMODE
5
EVN
4
December 24, 2008
http://www.Innovasic.com
PE
3
Customer Support:
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2
MODE
1
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