C8051F501-IQ Silicon Laboratories Inc, C8051F501-IQ Datasheet - Page 288
![IC 8051 MCU 64K FLASH 48-QFP](/photos/12/17/121736/c8051f501-iq_sml.jpg)
C8051F501-IQ
Manufacturer Part Number
C8051F501-IQ
Description
IC 8051 MCU 64K FLASH 48-QFP
Manufacturer
Silicon Laboratories Inc
Series
C8051F50xr
Specifications of C8051F501-IQ
Program Memory Type
FLASH
Program Memory Size
64KB (64K x 8)
Package / Case
48-QFP
Mfg Application Notes
LIN Bootloader AppNote
Core Processor
8051
Core Size
8-Bit
Speed
50MHz
Connectivity
EBI/EMI, SMBus (2-Wire/I²C), SPI, UART/USART
Peripherals
POR, PWM, Temp Sensor, WDT
Number Of I /o
40
Ram Size
4.25K x 8
Voltage - Supply (vcc/vdd)
1.8 V ~ 5.25 V
Data Converters
A/D 32x12b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 125°C
Processor Series
C8051F5x
Core
8051
Data Bus Width
8 bit
Data Ram Size
4.25 KB
Interface Type
I2C/SPI/UART
Maximum Clock Frequency
50 MHz
Number Of Programmable I/os
40
Number Of Timers
4
Maximum Operating Temperature
+ 125 C
Mounting Style
SMD/SMT
3rd Party Development Tools
PK51, CA51, A51, ULINK2
Development Tools By Supplier
C8051F500DK
Minimum Operating Temperature
- 40 C
On-chip Adc
32-ch x 12-bit
Package
48PQFP
Device Core
8051
Family Name
C8051F50x
Maximum Speed
50 MHz
Operating Supply Voltage
2.5|3.3|5 V
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
For Use With
336-1527 - KIT DEV FOR C8051F50X
Eeprom Size
-
Lead Free Status / Rohs Status
Lead free / RoHS Compliant
Other names
336-1512
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
C8051F501-IQ
Manufacturer:
Silicon Laboratories Inc
Quantity:
10 000
Company:
Part Number:
C8051F501-IQR
Manufacturer:
Silicon Laboratories Inc
Quantity:
10 000
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C8051F50x/F51x
27.1. PCA Counter/Timer
The 16-bit PCA counter/timer consists of two 8-bit SFRs: PCA0L and PCA0H. PCA0H is the high byte
(MSB) of the 16-bit counter/timer and PCA0L is the low byte (LSB). Reading PCA0L automatically latches
the value of PCA0H into a “snapshot” register; the following PCA0H read accesses this “snapshot” register.
Reading the PCA0L Register first guarantees an accurate reading of the entire 16-bit PCA0 counter.
Reading PCA0H or PCA0L does not disturb the counter operation. The CPS[2:0] bits in the PCA0MD reg-
ister select the timebase for the counter/timer as shown in Table 27.1.
When the counter/timer overflows from 0xFFFF to 0x0000, the Counter Overflow Flag (CF) in PCA0MD is
set to logic 1 and an interrupt request is generated if CF interrupts are enabled. Setting the ECF bit in
PCA0MD to logic 1 enables the CF flag to generate an interrupt request. The CF bit is not automatically
cleared by hardware when the CPU vectors to the interrupt service routine, and must be cleared by soft-
ware. Clearing the CIDL bit in the PCA0MD register allows the PCA to continue normal operation while the
CPU is in Idle mode.
288
SYSCLK/12
SYSCLK/4
Timer 0 Overflow
ECI
SYSCLK
External Clock/8
*Note: External oscillator source divided by 8 is synchronized with the system clock.
CPS2
0
0
0
0
1
1
1
C
D
L
I
W
D
E
T
PCA0MD
W
D
C
K
L
CPS1
C
P
S
2
000
001
010
011
100
101
C
P
S
1
0
0
1
1
0
0
1
C
P
S
0
C
E
F
Figure 27.2. PCA Counter/Timer Block Diagram
IDLE
CPS0
Table 27.1. PCA Timebase Input Options
C
0
1
0
1
0
1
x
F
C
R
PCA0CN
C
C
F
5
C
C
F
4
C
C
F
3
System clock divided by 12.
System clock divided by 4.
Timer 0 overflow.
High-to-low transitions on ECI (max rate = system clock divided
by 4).
System clock.
External oscillator source divided by 8.
Reserved.
C
C
F
2
C
C
F
1
C
C
F
0
Rev. 1.2
0
1
PCA0L
read
Snapshot
Register
PCA0H
Timebase
PCA0L
*
To SFR Bus
To PCA Modules
Overflow
CF
To PCA Interrupt System
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