C8051F321R Silicon Laboratories Inc, C8051F321R Datasheet - Page 201

• Manufacturer Part Number: C8051F321R
• Description: IC 8051 MCU 16K FLASH 28MLP
• Manufacturer: Silicon Laboratories Inc
• Series: C8051F32xr

Specifications of C8051F321R

• Core Processor: 8051
• Core Size: 8-Bit
• Speed: 25MHz
• Connectivity: SMBus (2-Wire/I²C), SPI, UART/USART, USB
• Peripherals: Brown-out Detect/Reset, POR, PWM, Temp Sensor, WDT
• Number Of I /o: 21
• Program Memory Size: 16KB (16K x 8)
• Program Memory Type: FLASH
• Ram Size: 2.25K x 8
• Voltage - Supply (vcc/vdd): 2.7 V ~ 3.6 V
• Data Converters: A/D 13x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 28-VQFN Exposed Pad, 28-HVQFN, 28-SQFN, 28-DHVQFN
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Eeprom Size: -
• Other names: 336-1067-2

Table 17.3. Timer Settings for Standard Baud Rates Using an External Oscillator
Table 17.4. Timer Settings for Standard Baud Rates Using an External Oscillator
Frequency: 22.1184 MHz
Target
Baud Rate
(bps)
Frequency: 18.432 MHz
Target
Baud Rate
(bps)
230400
115200
230400
115200
230400
115200
230400
115200
57600
28800
14400
57600
28800
14400
57600
28800
14400
57600
28800
14400
9600
2400
1200
9600
9600
2400
1200
9600
Baud Rate
% Error
Baud Rate
% Error
0.00%
0.00%
0.00%
0.00%
0.00%
0.00%
0.00%
0.00%
0.00%
0.00%
0.00%
0.00%
0.00%
0.00%
0.00%
0.00%
0.00%
0.00%
0.00%
0.00%
0.00%
0.00%
0.00%
0.00%
0.00%
0.00%
0.00%
0.00%
†
†
SCA1-SCA0 and T1M bit definitions can be found in
SCA1-SCA0 and T1M bit definitions can be found in
Divide
Factor
Divide
Factor
Oscillator
Oscillator
18432
15360
1536
2304
9216
1536
2304
1280
1920
7680
1280
1920
192
384
768
192
384
768
160
320
640
160
320
640
96
96
80
80
Timer Clock
Source
SYSCLK / 12
SYSCLK / 12
SYSCLK / 12
SYSCLK / 48
SYSCLK / 48
Timer Clock
Source
SYSCLK / 12
SYSCLK / 48
SYSCLK / 48
EXTCLK / 8
EXTCLK / 8
EXTCLK / 8
EXTCLK / 8
EXTCLK / 8
EXTCLK / 8
EXTCLK / 8
EXTCLK / 8
EXTCLK / 8
EXTCLK / 8
EXTCLK / 8
EXTCLK / 8
SYSCLK / 4
SYSCLK / 4
SYSCLK
SYSCLK
Rev. 1.1
SYSCLK
SYSCLK
SYSCLK
SYSCLK
X = Don’t care
X = Don’t care
SCA1-SCA0
(pre-scale select)
SCA1-SCA0
(pre-scale select)
XX
XX
XX
XX
XX
XX
00
00
00
10
10
01
01
00
10
10
11
11
11
11
11
11
11
11
11
11
11
11
C8051F320/1
†
†
Section
Section
T1M
T1M
1
1
1
0
0
0
0
0
0
0
0
1
1
1
0
0
0
0
0
0
0
0
0
0
0
0
0
0
†
†
19.1.
19.1.
Timer 1
Reload
Value (hex)
Timer 1
Reload
Value (hex)
0xEC
0xD0
0xA0
0xC0
0xA0
0xA0
0xFA
0xD0
0xA0
0xD8
0xB0
0xB0
0xB0
0xB0
0xFB
0xD8
0xB0
0xE0
0xF4
0xE8
0xF6
0x40
0x40
0x70
0x60
0x60
0x60
0x88
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