C8051F350DK Silicon Laboratories Inc, C8051F350DK Datasheet - Page 196

• Manufacturer Part Number: C8051F350DK
• Description: DEV KIT FOR F350/351/352/353
• Manufacturer: Silicon Laboratories Inc
• Type: MCUr

Specifications of C8051F350DK

• Contents: Evaluation Board, Power Supply, USB Cables, Adapter and Documentation
• Processor To Be Evaluated: C8051F35x
• Interface Type: USB
• Silicon Manufacturer: Silicon Labs
• Core Architecture: 8051
• Silicon Core Number: C8051F350
• Silicon Family Name: C8051F35x
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• For Use With/related Products: C8051F350, 351, 352, 353
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• Other names: 336-1083

C8051F350/1/2/3
The C/T0 bit (TMOD.2) selects the counter/timer's clock source. When C/T0 is set to logic 1, high-to-low
transitions at the selected Timer 0 input pin (T0) increment the timer register (Refer to Section
“18.1. Priority Crossbar Decoder’ on page 139 for information on selecting and configuring external I/O
pins). Clearing C/T selects the clock defined by the T0M bit (CKCON.3). When T0M is set, Timer 0 is
clocked by the system clock. When T0M is cleared, Timer 0 is clocked by the source selected by the Clock
Scale bits in CKCON (see SFR Definition 22.3).
Setting the TR0 bit (TCON.4) enables the timer when either GATE0 (TMOD.3) is logic 0 or the input signal
/INT0 is active as defined by bit IN0PL in register IT01CF (see SFR Definition 12.5). Setting GATE0 to ‘1’
allows the timer to be controlled by the external input signal /INT0 (see Section “12.4. Interrupt Register
Descriptions’ on page 107), facilitating pulse width measurements.
Setting TR0 does not force the timer to reset. The timer registers should be loaded with the desired initial
value before the timer is enabled.
TL1 and TH1 form the 13-bit register for Timer 1 in the same manner as described above for TL0 and TH0.
Timer 1 is configured and controlled using the relevant TCON and TMOD bits just as with Timer 0. The
input signal /INT1 is used with Timer 1; the /INT1 polarity is defined by bit IN1PL in register IT01CF (see
SFR Definition 12.5).
22.1.2. Mode 1: 16-bit Counter/Timer
Mode 1 operation is the same as Mode 0, except that the counter/timer registers use all 16 bits. The
counter/timers are enabled and configured in Mode 1 in the same manner as for Mode 0.
196
/INT0
T0
Crossbar
Pre-scaled Clock
SYSCLK
IN0PL
GATE0
XOR
Figure 22.1. T0 Mode 0 Block Diagram
TR0
X = Don't Care
0
1
1
1
TR0
0
1
M
H
T
3
M
T
3
L
GATE0
CKCON
M
H
T
2
M
T
2
L
X
0
1
1
0
1
M
T
1
T
M
0
C
S
A
1
S
C
A
0
Rev. 1.1
G
A
T
E
1
C
T
1
/INT0
/
M
T
1
1
TMOD
X
X
0
1
M
T
1
0
TCLK
G
A
T
E
0
C
T
0
/
M
T
0
1
M
T
0
0
(5 bits)
Counter/Timer
TL0
N
P
1
L
I
Disabled
Disabled
Enabled
Enabled
N
1
S
L
2
I
IT01CF
N
S
1
L
1
I
N
1
S
L
0
I
N
P
0
L
(8 bits)
I
TH0
N
0
S
L
2
I
N
S
0
L
1
I
N
0
S
L
0
I
TR1
TR0
TF1
TF0
IE1
IE0
IT1
IT0
Interrupt