MC68360RC25K Freescale Semiconductor, MC68360RC25K Datasheet - Page 254
MC68360RC25K
Manufacturer Part Number
MC68360RC25K
Description
IC MPU QUICC 25MHZ 241-PGA
Manufacturer
Freescale Semiconductor
Datasheets
1.MC68EN360VR25L.pdf
(14 pages)
2.MC68EN360VR25L.pdf
(2 pages)
3.MC68360AI25L.pdf
(962 pages)
Specifications of MC68360RC25K
Processor Type
M683xx 32-Bit
Speed
25MHz
Voltage
5V
Mounting Type
Surface Mount
Package / Case
241-PGA
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Features
-
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
MC68360RC25K
Manufacturer:
FREESCALE
Quantity:
1 831
- Current page: 254 of 962
- Download datasheet (4Mb)
System Integration Module (SIM60)
6.3.2 Periodic Interrupt Timer (PIT)
The PIT consists of an 8-bit modulus counter that is loaded with the value contained in the
PITR (see Table 6-4). The modulus counter is clocked by the SPCLK signal derived from
the EXTAL pin (either EXTAL or EXTAL divided by 128 as determined by the MODCK1–
MODCK0 pins). When MODCK1 is low (an external oscillator is used), the 512 (2 9 ) pres-
caler is enabled, and the SWP and PTP bits in the PITR are set.
The clock source is divided by 4 before driving the modulus counter (PITCLK). When the
modulus counter value reaches zero, an interrupt is generated. The level of the generated
interrupt is programmed into the PIRQL bits in the periodic interrupt control register (PICR).
During the interrupt acknowledge cycle, the SIM60 places the periodic interrupt vector, pro-
grammed into the PIV bits in the PICR, onto the bus. The value of bits 7–0 in the PITR is
then loaded again into the modulus counter, and the counting process starts over. If a new
value is written to the PITR, this value is loaded into the modulus counter when the current
count is complete.
6.3.2.1 PIT PERIOD CALCULATION. The period of the PIT can be calculated using the fol-
lowing equation:
Solving the equation using a crystal frequency of 32.768-kHz with the prescaler disabled
gives:
This gives a range from 122 s, with a PITR value of $01 (00000001 binary), to 31.128 ms,
with a PITR value of $FF (11111111 binary).
Solving the equation with the prescaler enabled (PTP = 1) gives the following values:
6-10
PIT period =
Freescale Semiconductor, Inc.
PIT period
For More Information On This Product,
PIT period =
PIT period =
MC68360 USER’S MANUAL
Go to: www.freescale.com
=
SPCLK / prescaler value
PITR count value
PITR count value
PITR count value
PITR count value
32768/512
32768/1
8192
2 2
2 2
2 2
Related parts for MC68360RC25K
Image
Part Number
Description
Manufacturer
Datasheet
Request
R
Part Number:
Description:
Manufacturer:
Freescale Semiconductor, Inc
Datasheet:
Part Number:
Description:
MC68360 MC68360 Multiple Ethernet Channels on the QUICC
Manufacturer:
Motorola / Freescale Semiconductor
Part Number:
Description:
MC68360 Implementing an 8 bit Eprom for an MC68EC040-MC68360 System
Manufacturer:
Motorola / Freescale Semiconductor
Part Number:
Description:
MC68360 Interfacing the MC68060 to the MC68360
Manufacturer:
Motorola / Freescale Semiconductor
Part Number:
Description:
MC68360 MC68360 RAM Microcode Package Option Overview
Manufacturer:
Motorola / Freescale Semiconductor
Part Number:
Description:
MC68360 MC68360 CPM-CPU Interaction
Manufacturer:
Motorola / Freescale Semiconductor
Part Number:
Description:
MC68360 Interfacing SDRAM to the MC68360 QUICC Device
Manufacturer:
Motorola / Freescale Semiconductor
Part Number:
Description:
MC68360 Interfacing the QUICC to a MCM516400 (4Mx4 10-12 column-row) DRAM
Manufacturer:
Motorola / Freescale Semiconductor
Part Number:
Description:
MC68360 Interfacing the 68360 (QUICC) to T1-E1 Systems
Manufacturer:
Motorola / Freescale Semiconductor
Part Number:
Description:
MC68360 Multiple QUICC Design Concept
Manufacturer:
Motorola / Freescale Semiconductor
Part Number:
Description:
Manufacturer:
Freescale Semiconductor, Inc
Datasheet:
Part Number:
Description:
Manufacturer:
Freescale Semiconductor, Inc
Datasheet:
Part Number:
Description:
Manufacturer:
Freescale Semiconductor, Inc
Datasheet:
Part Number:
Description:
Manufacturer:
Freescale Semiconductor, Inc
Datasheet:
Part Number:
Description:
Manufacturer:
Freescale Semiconductor, Inc
Datasheet: