MC68376BGMAB20 Freescale Semiconductor, MC68376BGMAB20 Datasheet - Page 368

• Manufacturer Part Number: MC68376BGMAB20
• Description: IC MCU 32BIT 8K ROM 160-QFP
• Manufacturer: Freescale Semiconductor
• Series: M683xxr

Specifications of MC68376BGMAB20

• Core Processor: CPU32
• Core Size: 32-Bit
• Speed: 20MHz
• Connectivity: CAN, EBI/EMI, SCI, SPI
• Peripherals: POR, PWM, WDT
• Number Of I /o: 18
• Program Memory Type: ROMless
• Ram Size: 7.5K x 8
• Voltage - Supply (vcc/vdd): 4.75 V ~ 5.25 V
• Data Converters: A/D 16x10b
• Oscillator Type: External
• Operating Temperature: -40°C ~ 125°C
• Package / Case: 160-QFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Program Memory Size: -

D.6.12 QSPI Control Register 1
SPCR1 — QSPI Control Register 1
SPE — QSPI Enable
DSCKL[6:0] — Delay before SCK
D-50
MOTOROLA
RESET:
SPE
15
0
Giving SPBR[7:0] a value of zero or one disables the baud rate generator. SCK is
disabled and assumes its inactive state value. No serial transfers occur. At reset, the
SCK baud rate is initialized to one eighth of the system clock frequency.
SPCR1 enables the QSPI and specified transfer delays. The CPU32 has read/write
access to SPCR1, but the QSM has read access only to all bits except SPE. SPCR1
must be written last during initialization because it contains SPE. Writing a new value
to SPCR1 while the QSPI is enabled disrupts operation.
When the DSCK bit is set in a command RAM byte, this field determines the length of
the delay from PCS valid to SCK transition. PCS can be any of the four peripheral chip-
select pins. The following equation determines the actual delay before SCK:
where DSCKL[6:0] equals is in the range of 1 to 127.
When DSCK is zero in a command RAM byte, then DSCKL[6:0] is not used. Instead,
the PCS valid to SCK transition is one-half the SCK period.
0 = QSPI is disabled. QSPI pins can be used for general-purpose I/O.
1 = QSPI is enabled. Pins allocated by PQSPAR are controlled by the QSPI.
14
0
13
0
12
0
DSCKL[6:0]
11
0
SPBR[7:0]
PCS to SCK Delay
SCK Baud Rate
10
1
REGISTER SUMMARY
9
0
=
------------------------------------------------------------------------- -
2 SCK Baud Rate Desired
8
0
or
7
0
=
------------------------------------ -
2 SPBR[7:0]
=
6
0
DSCKL[6:0]
------------------------------ -
f
sys
f
sys
f
sys
5
0
4
0
DTL[7:0]
3
0
USER’S MANUAL
2
1
MC68336/376
$YFFC1A
1
0
0
0