Rev. 1.2 10/14 Copyright © 2014 by Silicon Labo ratories C8051F99x-C8051F98x
C8051F99x-C8051F98x
C8051F99X-C8051F98X DATA SHEET ADDENDUM
1. Introduction
The purpose of this document is to document a new part number in the C8051F99x/98x family and the associated
features of that part number. Unless otherwise stated, all aspects of the C8051F99x/98x data sheet apply to the
device described here.
2. Ordering Information
The C8051F980-C1-GM device has all the same features of the C8051F980-GM device with the addition of a
unique identifier (UID) in XRAM. More information on the UID can be found in "5. Unique Identifier (UID)
(C8051F980-C1-GM only)" on page 2.
3. Package Markings
The C8051F980-C1-GM and C8051F980-C-GM devices have identical package markings.
Table 2.1. Product Selection Guide
Ordering Part Number
MIPS (Peak)
Flash Memory (kB)
RAM (bytes)
SmaRTClock Real Time Clock
SMBus/I
2
C, UART, Enhanced SPI
Timers (16-bit)
Programmable Counter Array
Digital Port I/Os
Analog to Digital Converter Inputs
ADC with internal voltage reference
and temperature sensor
Capacitive Touch Inputs
Programmabl e Current Reference
Analog Comparators
Lead-free (RoHS Compliant)
Unique Identifier (UID)
Package
C8051F980-C-GM 25 8 512
4
16 9 12-bit —
1
—QFN-20
C8051F980-C1-GM 25 8 512
4
16 9 12-bit —
1
QFN-20
C8051F99x-C8051F98x
2 Rev. 1.2
4. Determining the Device Part Number at Run Time
In many applications, user soft ware may ne ed to de termin e the MCU p art num ber at run time in order to deter mine
the hardware capabilities. The part number can be determined by reading the value of the DEVICEID Special
Function Register. The value of the DEVICEID register can be decoded as follows:
0xD3—C8051F980-C
0xE3—C8051F980-C1
SFR Page = 0xF; SFR Address = 0xE3
5. Unique Identifier (UID) (C8051F980-C1-GM only)
The C8051F980-C1-GM has a pre-programmed 32-bit (4-byte) Unique Identifier (UID). The UID resides in the last
four bytes of XRAM. The UID can be read by firmware using MOVX instructions and through the debug port.
Firmware can overwrite the UID during normal operation, and the bytes in memory will be automatically reinitialized
with the factor y-prog ram med UID valu e after any de vice re set. Firmware using this area of memory should always
initialize the memory to a known value, as any previous data stored at these locations will be overwritten and not
retained through a reset.
SFR Definition 4.1. DEVICEID: Device Identification
Bit76543210
Name
DEVICEID[7:0]
Type
R/W
Reset
00000000
Bit Name Function
7:0 DEVICEID[7:0] Device Identification.
These bits contain a value that can be decoded to determine the device par t
number.
Table 5.1. UID Implementation Information
Device External Memory (XRAM) Addresses
C8051F980-C1-GM (MSB) 0x00FF, 0x00FE, 0x00FD, 0x00FC (LSB)