C8051T605-GSR Silicon Laboratories Inc, C8051T605-GSR Datasheet - Page 165
C8051T605-GSR
Manufacturer Part Number
C8051T605-GSR
Description
MCU 8-Bit C8051T60x 8051 CISC 2KB EPROM 1.8V/3V 14-Pin SOIC T/R
Manufacturer
Silicon Laboratories Inc
Datasheet
1.C8051T600SDB.pdf
(188 pages)
Specifications of C8051T605-GSR
Package
14SOIC
Device Core
8051
Family Name
C8051T60x
Maximum Speed
25 MHz
Ram Size
256 Byte
Program Memory Size
2 KB
Operating Supply Voltage
1.8|3 V
Data Bus Width
8 Bit
Program Memory Type
EPROM
Number Of Programmable I/os
8
Interface Type
I2C/SMBus/UART
Operating Temperature
-40 to 85 °C
Number Of Timers
3
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26.3.2. Software Timer (Compare) Mode
In Software Timer mode, the PCA counter/timer value is compared to the module's 16-bit Capture/Com-
pare register (PCA0CPHn and PCA0CPLn). When a match occurs, the Capture/Compare Flag (CCFn) in
PCA0CN is set to logic 1. An interrupt request is generated if the CCFn interrupt for that module is
enabled. The CCFn bit is not automatically cleared by hardware when the CPU vectors to the interrupt ser-
vice routine, and must be cleared by software. Setting the ECOMn and MATn bits in the PCA0CPMn regis-
ter enables Software Timer mode.
Important Note about Capture/Compare Registers: When writing a 16-bit value to the PCA0 Cap-
ture/Compare registers, the low byte should always be written first. Writing to PCA0CPLn clears the
ECOMn bit to 0; writing to PCA0CPHn sets ECOMn to 1.
PCA0CPLn
Write to
Reset
PCA0CPHn
Write to
0
ENB
ENB
1
Figure 26.5. PCA Software Timer Mode Diagram
W
M
P
1
6
n
x
E
C
O
M
n
PCA0CPMn
C
A
P
P
n
0 0
C
A
P
N
n
M
A
T
n
O
G
T
n
0 0
P
W
M
n
C
C
E
F
n
x
Enable
PCA
Timebase
Rev. 1.2
PCA0CPLn
PCA0L
16-bit Comparator
C8051T600/1/2/3/4/5/6
PCA0CPHn
PCA0H
Match
C
F
C
R
PCA0CN
0
1
C
C
F
2
C
C
F
1
C
C
F
0
PCA Interrupt
165
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