August 27, 1998
GENERAL RELEASE SPECIFICATION
16.5 PEPROM PREPROGRAMMED OPTIONS
The MC68HC05SB7 is available with a factory preprogrammed PEPROM.The fol-
lowing measured parameters are available:
•
•
•
•
The internal VCO minimum frequency: [programmed or left blank]
The internal VCO maximum frequency: [programmed or left blank]
The internal bandgap reference voltage: [programmed or left blank]
The internal temperature sensor voltage: [programmed or left blank]
Each parameter is stored as a 16-bit value in the PEPROM, as shown in the
Table 16-1. Unprogrammed bits are blank, and are available for user
programming.
Table 16-2. PEPROM Preprogrammed Option
PEBSR
(LSB - MSB)
DATA
$00 - $0F
$10 - $1F
VCO Minimum Frequency (f
)
VCOMIN
VCO Maximum Frequency (f
)
VCOMAX
$20 - $2F
Internal Bandgap Voltage (V )
IB
1
$30 - $3F
Temperature Sensor Voltage
Note: 1. measured at 80°C
16.5.1 Data Format in Preprogrammed PEPROM
The 16-bit value is a binary representation of the measured data (4 digits, with the
decimal point removed). Some examples are shown below.
For a measured data for f
=1.500MHz, it is converted to 1500 or 5DC (hex)
VCOMIN
and the hex data is programmed as 0000 0101 1101 1100.
For a measured data for f =5.800MHz, it is converted to 5800 or 16A8
VCOMAX
(hex) and the hex data is programmed as 0001 0110 1010 1000.
For a measured data for V =1.211V, it is converted to 1211 or 4BB (hex) and the
IB
hex data is programmed as 0000 0100 1011 1011.
For a measured data for V
=836.0mV, it is converted to 8360 or 20A8 (hex)
TEMP
and the hex data is programmed as 0010 0000 1010 1000.
MC68HC05SB7
REV 2.1
PERSONALITY EPROM
MOTOROLA
16-5
FREESCALE [ Freescale ]
