C8051F321-GM Silicon Laboratories Inc, C8051F321-GM Datasheet - Page 232
![IC 8051 MCU 16K FLASH 28MLP](/photos/6/93/69391/sl-28-mlp_sml.jpg)
C8051F321-GM
Manufacturer Part Number
C8051F321-GM
Description
IC 8051 MCU 16K FLASH 28MLP
Manufacturer
Silicon Laboratories Inc
Series
C8051F32xr
Datasheets
1.C8051F320-TB.pdf
(250 pages)
2.C8051F321-GMR.pdf
(2 pages)
3.C8051F321-GM.pdf
(256 pages)
Specifications of C8051F321-GM
Program Memory Type
FLASH
Program Memory Size
16KB (16K x 8)
Package / Case
28-VQFN Exposed Pad, 28-HVQFN, 28-SQFN, 28-DHVQFN
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
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
Processor Series
C8051F3x
Core
8051
Data Bus Width
8 bit
Data Ram Size
2.25 KB
Interface Type
I2C/SMBus/SPI/UART/USB
Maximum Clock Frequency
25 MHz
Number Of Programmable I/os
21
Number Of Timers
4
Operating Supply Voltage
2.7 V to 3.6 V
Maximum Operating Temperature
+ 85 C
Mounting Style
SMD/SMT
3rd Party Development Tools
PK51, CA51, A51, ULINK2
Development Tools By Supplier
C8051F320DK
Minimum Operating Temperature
- 40 C
On-chip Adc
13-ch x 10-bit or 17-ch x 10-bit
No. Of I/o's
21
Ram Memory Size
1280Byte
Cpu Speed
25MHz
No. Of Timers
4
Rohs Compliant
Yes
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
For Use With
336-1480 - DAUGHTER CARD TOOLSTCK C8051F321770-1006 - ISP 4PORT FOR SILABS C8051F MCU336-1449 - ADAPTER PROGRAM TOOLSTICK F321336-1260 - DEV KIT FOR C8051F320/F321
Eeprom Size
-
Lead Free Status / Rohs Status
Lead free / RoHS Compliant
Other names
336-1261
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
C8051F321-GM
Manufacturer:
SiliconL
Quantity:
4 364
Part Number:
C8051F321-GM
Manufacturer:
SILICON LABS/芯科
Quantity:
20 000
Part Number:
C8051F321-GMR
Manufacturer:
SILICON LABS/芯科
Quantity:
20 000
C8051F320/1
19.3.3. USB Start-of-Frame Capture
When T3SOF = ‘1’, Timer 3 operates in USB Start-of-Frame (SOF) capture mode. When T3SPLIT = ‘0’, Timer 3
counts up and overflows from 0xFFFF to 0x0000. Each time a USB SOF is received, the contents of the Timer 3 reg-
isters (TMR3H:TMR3L) are latched into the Timer 3 Reload registers (TMR3RLH:TMR3RLL). A Timer 3 interrupt
is generated if enabled. This mode can be used to calibrate the system clock or external oscillator against the known
USB host SOF clock.
When T3SPLIT = ‘1’, the Timer 3 registers (TMR3H and TMR3L) act as two 8-bit counters. Each counter counts up
independently and overflows from 0xFF to 0x00. Each time a USB SOF is received, the contents of the Timer 3 reg-
isters are latched into the Timer 3 Reload registers (TMR3RLH and TMR3RLL). A Timer 3 interrupt is generated if
enabled.
232
Figure 19.22. Timer 3
External Clock / 8
‘0’)
SYSCLK / 12
(T3SPLIT
Capture
External Clock / 8
T
F
H
Mode
3
=
T
F
3
L
TMR3CN
T
F
3
L
E
N
SYSCLK / 12
SOF
O
T
3
S
F
SYSCLK
T
3
S
P
L
T
I
R
T
3
H
T
F
3
T
F
3
L
X
C
K
T
3
L
0
1
TMR3CN
E
N
T
F
3
L
T
S
O
F
3
T
S
P
T
3
L
I
T
R
3
SYSCLK
C
T
3
X
L
K
0
1
Figure 19.23. Timer 3 SOF Capture Mode (T3SPLIT = ‘1’)
Start-of-Frame
M
T
3
H
0
1
1
0
M
T
3
L
0
1
(SOF)
USB
CKCON
M
H
T
2
M
H
T
3
M
T
2
L
M
T
3
L
M
T
1
CKCON
M
H
T
2
M
T
0
M
T
2
L
TR3
S
C
A
1
TR3
M
T
1
S
C
A
0
M
T
0
Rev. 1.1
S
C
A
1
S
C
A
0
Enable
TCLK
TCLK
Capture
TCLK
TMR3RLH
TMR3RLL
TMR3H
TMR3L
TMR3RLL TMR3RLH
TMR3L
Interrupt
Capture
Capture
TMR3H
To ADC
Start-of-Frame
(SOF)
Enable
USB
To ADC
Interrupt