C8051F987-GU Silicon Laboratories Inc, C8051F987-GU Datasheet - Page 198
C8051F987-GU
Manufacturer Part Number
C8051F987-GU
Description
IC MCU 8BIT 8KB FLASH 24QSOP
Manufacturer
Silicon Laboratories Inc
Series
C8051F9xxr
Specifications of C8051F987-GU
Program Memory Type
FLASH
Program Memory Size
8KB (8K x 8)
Package / Case
24-QSOP
Core Processor
8051
Core Size
8-Bit
Speed
25MHz
Connectivity
SMBus (2-Wire/I²C), SPI, UART/USART
Peripherals
Brown-out Detect/Reset, POR, PWM, WDT
Number Of I /o
17
Ram Size
512 x 8
Voltage - Supply (vcc/vdd)
1.8 V ~ 3.6 V
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Processor Series
C8051F9x
Core
8051
Data Ram Size
512 B
Interface Type
I2C, SMBus, Enhanced UART, Enhanced SPI
Maximum Clock Frequency
7 KHz
Number Of Programmable I/os
17
Number Of Timers
4
Operating Supply Voltage
2.4 V
Maximum Operating Temperature
+ 85 C
Mounting Style
SMD/SMT
3rd Party Development Tools
PK51, CA51, A51, ULINK2
Development Tools By Supplier
C8051F996DK
Minimum Operating Temperature
- 40 C
On-chip Adc
1 Analog Comparator
On-chip Dac
10 bit, 4 Channel
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Eeprom Size
-
Data Converters
-
Lead Free Status / Rohs Status
Lead free / RoHS Compliant
Other names
336-1955-5
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C8051F987-GU
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C8051F99x-C8051F98x
20.1.5. RTC0ADR Autoincrement Feature
For ease of reading and writing the 32-bit CAPTURE and ALARM values, RTC0ADR automatically incre-
ments after each read or write to a CAPTUREn or ALARMn register. This speeds up the process of setting
an alarm or reading the current SmaRTClock timer value. Autoincrement is always enabled.
Recommended Instruction Timing for a multi-byte register read with short strobe and auto read enabled:
mov RTC0ADR, #0d0h
nop
nop
nop
mov A, RTC0DAT
nop
nop
mov A, RTC0DAT
nop
nop
mov A, RTC0DAT
nop
nop
mov A, RTC0DAT
Recommended Instruction Timing for a multi-byte register write with short strobe enabled:
mov RTC0ADR, #010h
mov RTC0DAT, #05h
nop
mov RTC0DAT, #06h
nop
mov RTC0DAT, #07h
nop
mov RTC0DAT, #08h
nop
198
Rev. 1.0
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