MC68376BAMFT20 Freescale Semiconductor, MC68376BAMFT20 Datasheet - Page 208

• Manufacturer Part Number: MC68376BAMFT20
• Manufacturer: Freescale Semiconductor

Specifications of MC68376BAMFT20

• Cpu Family: 68K/M683xx
• Device Core: ColdFire
• Device Core Size: 32b
• Frequency (max): 20MHz
• Interface Type: QSPI/SCI
• Program Memory Type: ROM
• Program Memory Size: 8KB
• Total Internal Ram Size: 7.5KB
• # I/os (max): 18
• Number Of Timers - General Purpose: 2
• Operating Supply Voltage (typ): 5V
• Operating Supply Voltage (max): 5.25V
• Operating Supply Voltage (min): 4.75V
• On-chip Adc: 16-chx10-bit
• Instruction Set Architecture: RISC
• Operating Temp Range: -40C to 125C
• Operating Temperature Classification: Automotive
• Mounting: Surface Mount
• Pin Count: 160
• Package Type: PQFP
• Lead Free Status / Rohs Status: Not Compliant

8-26
MOTOROLA
QCLK EXAMPLES
Figure 8-9 and Table 8-4 show examples of QCLK programmability. The examples
include conversion times based on the following assumptions:
Figure 8-9 and Table 8-4 also show the conversion time calculated for a single con-
version in a queue. For other MCU system clock frequencies and other input sample
times, the same calculations can be made.
SYSTEM CLOCK
6. Calculate the QCLK frequency (f
7. Choose the number of input sample cycles (2, 4, 8, or 16) for a typical input
8. If the calculated conversion times are not sufficient, return to step 3. Conversion
9. Code the selected PSH, PSL, and PSA values into the prescaler fields of
• f
• Input sample time is as fast as possible (IST[1:0] = %00, 2 QCLK cycles).
sys
channel.
time is determined by the following equation:
QACR0.
EX1
EX2
= 20.97 MHz.
f
sys
Conversion time (in s
Figure 8-9 QADC Clock Programmability Examples
QUEUED ANALOG-TO-DIGITAL CONVERTER MODULE
---------------------------------------------------------------------------------------------------------------------------- -
QCLK high time (in ns)
f
QCLK
=
16 CYCLES
(in MHz)
QCLK
16
---------------------------------------------------------------------------------------------- -
+
).
+
Number of input sample cycles
QCLK low time (in ns)
=
1000
f
QCLK
(in MHz)
USER’S MANUAL
MC68336/376
QADC QCLK EX