C8051F997-GUR Silicon Labs, C8051F997-GUR Datasheet - Page 27

• Manufacturer Part Number: C8051F997-GUR
• Description: 8-bit Microcontrollers - MCU 8kB 14-CH CDC
• Manufacturer: Silicon Labs

Specifications of C8051F997-GUR

• Rohs: yes
• Core: 8051
• Processor Series: C8051
• Data Bus Width: 8 bit

1.3.
The C8051F99x-C8051F98x Family includes an SMBus/I
baud rate configuration, and an Enhanced SPI interface. Each of the serial buses is fully implemented in
hardware and makes extensive use of the CIP-51's interrupts, thus requiring very little CPU intervention.
1.4.
An on-chip programmable counter/timer array (PCA) is included in addition to the four 16-bit general
purpose counter/timers. The PCA consists of a dedicated 16-bit counter/timer time base with three
programmable capture/compare modules. The PCA clock is derived from one of seven sources: the
system clock divided by 12, the system clock divided by 4, Timer 0 overflows, an External Clock Input
(ECI), the system clock, the external oscillator clock source divided by 8, or the SmaRTClock divided by 8.
Each capture/compare module can be configured to operate in a variety of modes: edge-triggered capture,
software timer, high-speed output, pulse width modulator (8, 9, 10, 11, or 16-bit), or frequency output.
Additionally, Capture/Compare Module 2 offers watchdog timer (WDT) capabilities. Following a system
reset, Module 2is configured and enabled in WDT mode. The PCA Capture/Compare Module I/O and
External Clock Input may be routed to Port I/O via the Digital Crossbar.
Serial Ports
Programmable Counter Array
C a p tu r e /C o m p a r e
M o d u le 0
S Y S C L K / 1 2
S Y S C L K / 4
E x te r n a l C lo c k / 8
S m a R T C lo c k /8
Figure 1.15. PCA Block Diagram
T im e r 0 O v e rflo w
E C I
S Y S C L K
P o r t I/ O
C r o s s b a r
C a p tu re /C o m p a re
Rev. 1.1
C L O C K
M U X
M o d u le 1
P C A
C8051F99x-C8051F98x
2
C interface, a full-duplex UART with enhanced
1 6 -B it C o u n te r/ T im e r
C a p tu re / C o m p a re
M o d u le 2 / W D T
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