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AR-B1380/AR-1380A User’ s Guide
Page 14
(7) Line Status Register (LSR)
Bit 0: Data Ready (DR)
Bit 1: Overrun Error (OR)
Bit 2: Parity Error (PE)
Bit 3: Framing Error (FE)
Bit 4: Break Interrupt (BI)
Bit 5: Transmitter Holding Register Empty (THRE)
Bit 6: Transmitter Shift Register Empty (TSRE)
Bit 7: Must be 0
(8) MODEM Status Register (MSR)
Bit 0: Delta Clear to Send (DCTS)
Bit 1: Delta Data Set Ready (DDSR)
Bit 2: Training Edge Ring Indicator (TERI)
Bit 3: Delta Receive Line Signal Detect (DSLSD)
Bit 4: Clear to Send (CTS)
Bit 5: Data Set Ready (DSR)
Bit 6: Ring Indicator (RI)
Bit 7: Received Line Signal Detect (RSLD)
(9) Divisor Latch (LS, MS)
LS
MS
Bit 0:
Bit 0
Bit 8
Bit 1:
Bit 1
Bit 9
Bit 2:
Bit 2
Bit 10
Bit 3:
Bit 3
Bit 11
Bit 4:
Bit 4
Bit 12
Bit 5:
Bit 5
Bit 13
Bit 6:
Bit 6
Bit 14
Bit 7:
Bit 7
Bit 15
Desired
Baud Rate
Divisor Used to
Generate 16x Clock
Present Error Difference
Between Desired and
Actual
50
2304
---
75
1536
---
110
1047
0.026
134.5
857
0.058
150
768
---
300
384
---
600
192
---
1200
96
---
1800
64
---
2000
58
0.69
2400
48
---
3600
32
---
4800
24
---
7200
16
---
9600
12
---
14400
8
---
19200
6
---
28800
4
---
38400
3
---
57600
2
---
Table 2-7 Serial Port Divisor Latch
Содержание AR-B1380
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