C8051F321R Silicon Laboratories Inc, C8051F321R Datasheet - Page 237

• 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

20.2. Capture/Compare Modules
Each module can be configured to operate independently in one of six operation modes: Edge-triggered Capture,
Software Timer, High Speed Output, Frequency Output, 8-Bit Pulse Width Modulator, or 16-Bit Pulse Width Modu-
lator. Each module has Special Function Registers (SFRs) associated with it in the CIP-51 system controller. These
registers are used to exchange data with a module and configure the module's mode of operation.
Table 20.2 summarizes the bit settings in the PCA0CPMn registers used to select the PCA capture/compare module’s
operating modes. Setting the ECCFn bit in a PCA0CPMn register enables the module's CCFn interrupt. Note: PCA0
interrupts must be globally enabled before individual CCFn interrupts are recognized. PCA0 interrupts are globally
enabled by setting the EA bit and the EPCA0 bit to logic 1. See Figure 20.3 for details on the PCA interrupt configu-
ration.
PWM16 ECOM CAPP CAPN
Timer Overflow
PCA Counter/
X
X
X
X
X
X
0
1
Table 20.2. PCA0CPM Register Settings for PCA Capture/Compare Modules
W
M
P
1
6
n
PCA Module 0
PCA Module 1
PCA Module 2
PCA Module 3
PCA Module 4
(for n = 0 to 4)
PCA0CPMn
O
M
E
C
n
C
A
P
P
(CCF0)
(CCF1)
(CCF2)
(CCF3)
(CCF4)
n
X = Don’t Care
C
A
P
N
n
M
A
T
n
X
X
X
1
1
1
1
1
O
G
T
n
W
P
M
n
C
C
E
F
n
C
F
C
R
PCA0CN
1
0
1
0
0
0
0
0
C
C
F
4
C
C
F
3
C
C
F
2
Figure 20.3. PCA Interrupt Block Diagram
C
C
F
1
C
C
F
0
ECCF0
ECCF1
ECCF2
ECCF3
ECCF4
0
1
1
0
0
0
0
0
C
D
L
I
W
D
E
T
PCA0MD
W
D
C
K
L
MAT
C
P
S
2
C
P
S
1
X
X
X
0
0
0
1
1
0
1
0
1
0
1
0
1
0
1
C
P
S
0
E
C
F
0
1
TOG
0
0
0
0
1
1
0
0
Rev. 1.1
PWM ECCF
0
0
0
0
0
1
1
1
X
X
X
X
X
X
X
X
Capture triggered by negative edge on
Capture triggered by positive edge on
Capture triggered by transition on
16-Bit Pulse Width Modulator
8-Bit Pulse Width Modulator
EPCA0
High Speed Output
Frequency Output
Operation Mode
Software Timer
C8051F320/1
0
1
CEXn
CEXn
CEXn
EA
0
1
Interrupt
Priority
Decoder
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