89C5121-SK1 Atmel, 89C5121-SK1 Datasheet - Page 91

• Manufacturer Part Number: 89C5121-SK1
• Description: KIT SMART CARD FOR AT89C5121
• Manufacturer: Atmel
• Type: Smart Cardr

Specifications of 89C5121-SK1

• Contents: Board
• For Use With/related Products: AT89C5121
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Other names: T89C5121-SK1; T89C5121-SK1

Baud Rate Selection (Mode 2)
4164G–SCR–07/06
Table 65. Internal Baud Rate Generator Value
Notes:
In mode 2, the baud rate can only be programmed to two fixed values: 1/16 or 1/32 of
the peripheral clock frequency.
As shown in Figure 49, the selection is done using SMOD1 bit in PCON register.
Figure 50 gives the baud rate calculation formula depending on the selection.
Figure 49. Baud Rate Generator Selection (Mode 2)
Figure 50. Baud Rate Formula (Mode 2)
Baud Rate
Baud Rate
115200
115200
57600
38400
19200
57600
38400
19200
9600
4800
9600
4800
1. These frequencies are achieved in X1 mode, F
2. These frequencies are achieved in X2 mode, F
CLOCK
PER
SPD
SPD
1
1
1
1
1
1
1
1
1
-
-
-
SMOD1
SMOD1
F
F
PER
1
1
1
1
1
1
1
1
1
PER
-
-
-
= 12 MHz
= 6 MHz
Baud_Rate =
³ 2
BRL
BRL
246
236
217
178
243
236
217
178
100
-
-
-
1
2
SMOD1
PCON.7
Error %
Error %
2SMOD1 FPER
2.34
2.34
0.16
0.16
0.16
2.34
0.16
0.16
0.16
0
1
-
-
-
32
SPD
SPD
PER
PER
³ 16
1
1
1
1
1
1
1
1
1
1
1
-
= F
= F
OSC
OSC
SMOD1
SMOD1
F
F
.
PER
1
1
1
1
1
1
1
1
1
1
1
PER
-
A/T8xC5121
2.
To Serial Port
= 16 MHz
= 8 MHz
BRL
BRL
247
243
230
204
152
247
239
230
204
152
48
-
1
2
Error %
Error %
3.55
0.16
0.16
0.16
0.16
3.55
2.12
0.16
0.16
0.16
0.16
-
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