T89C5121-ICUIL Atmel, T89C5121-ICUIL Datasheet - Page 91

• Manufacturer Part Number: T89C5121-ICUIL
• Description: IC 8051 MCU W/SMART CARD 24SSOP
• Manufacturer: Atmel
• Series: 89Cr

Specifications of T89C5121-ICUIL

• Core Processor: 8051
• Core Size: 8-Bit
• Speed: 16MHz
• Connectivity: SmartCard, UART/USART
• Peripherals: LED, POR, WDT
• Number Of I /o: 14
• Program Memory Size: 16KB (16K x 8)
• Program Memory Type: Flash RAM
• Eeprom Size: 16K x 8
• Ram Size: 256 x 8
• Voltage - Supply (vcc/vdd): 2.85 V ~ 5.4 V
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 24-SSOP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Data Converters: -
• Other names: Q1468934; T89C5121-ICSIL; T89C5121-ICSIL

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
-
91