
Signal Descriptions
2-10
Freescale Semiconductor
2.3.3
Mode Selection
describes signals used in mode selection.
Table 2-4. PLL and Clock Signals
Signal Name
Abbreviation
Function
I/O
External Clock In
EXTAL
Always driven by an external clock input except when used as a
connection to the external crystal when the internal oscillator circuit is
used. The clock source may be configured during reset by asserting
RCON. See
Chapter 9, “Chip Configuration Module (CCM)”
for more
details.
I
Crystal
XTAL
Used as a connection to the external crystal when the internal
oscillator circuit is used to drive the crystal.
O
32 kHz External Clock
In
EXTAL32K
32 kHz crystal input clock for the real time clock.
I
32 kHz Crystal
XTAL32K
Oscillator output to EXTAL 32kHz crystal.
O
USB Clock In
USBCLKIN
Allows the user to drive the reference clock to the USB modules,
instead of the clock being generated internally by the PLL. This pin
should only be driven with a 60 MHz clock. When using the ULPI USB
interface, this pin becomes the ULPI input clock.
I
SSI Clock In
SSICLKIN
Allows the user to drive a specific clock frequency to the SSI module,
instead of using the internally generated clock.
I
FlexBus Clock Out
FB_CLK
Reflects the internal bus clock (or one-third the core/system clock).
(f
sys/3
)
O
Table 2-5. Mode Selection Signals
Signal Name
Abbreviation
Function
I/O
Reset Configuration
RCON
Indicates whether the external D[15:0] pin states affect chip
configuration at reset.
I
SDR/DDR SDRAM
Select
DRAMSEL
Controls whether certain pins act as FlexBus or SDRAMC signals.
When asserted, D[31:0] dynamically switches between SDR data and
FlexBus data. When negated, D[31:16] are dedicated for DDR data
while D[15:0] are dedicated for FlexBus data.
I
MCF5329 Reference Manual, Rev 3
Содержание MCF5329
Страница 106: ...ColdFire Core 3 32 Freescale Semiconductor MCF5329 Reference Manual Rev 3...
Страница 126: ...Enhanced Multiply Accumulate Unit EMAC 4 20 Freescale Semiconductor MCF5329 Reference Manual Rev 3...
Страница 148: ...Cache 5 22 Freescale Semiconductor MCF5329 Reference Manual Rev 3...
Страница 154: ...Static RAM SRAM 6 6 Freescale Semiconductor MCF5329 Reference Manual Rev 3...
Страница 184: ...Power Management 8 18 Freescale Semiconductor MCF5329 Reference Manual Rev 3...
Страница 204: ...Reset Controller Module 10 8 Freescale Semiconductor MCF5329 Reference Manual Rev 3...
Страница 220: ...System Control Module SCM 11 16 Freescale Semiconductor MCF5329 Reference Manual Rev 3...
Страница 228: ...Crossbar Switch XBS 12 8 Freescale Semiconductor MCF5329 Reference Manual Rev 3...
Страница 268: ...General Purpose I O Module 13 40 Freescale Semiconductor MCF5329 Reference Manual Rev 3...
Страница 392: ...SDRAM Controller SDRAMC 18 30 Freescale Semiconductor MCF5329 Reference Manual Rev 3...
Страница 436: ...Fast Ethernet Controller FEC 19 44 Freescale Semiconductor MCF5329 Reference Manual Rev 3...
Страница 564: ...Liquid Crystal Display Controller LCDC 22 44 Freescale Semiconductor MCF5329 Reference Manual Rev 3...
Страница 594: ...FlexCAN 23 30 Freescale Semiconductor MCF5329 Reference Manual Rev 3...
Страница 678: ...Pulse Width Modulation PWM Module 26 22 Freescale Semiconductor MCF5329 Reference Manual Rev 3...
Страница 684: ...Watchdog Timer Module 27 6 Freescale Semiconductor MCF5329 Reference Manual Rev 3...
Страница 692: ...Programmable Interrupt Timers PIT0 PIT3 28 8 Freescale Semiconductor MCF5329 Reference Manual Rev 3...
Страница 704: ...DMA Timers DTIM0 DTIM3 29 12 Freescale Semiconductor MCF5329 Reference Manual Rev 3...
Страница 720: ...Queued Serial Peripheral Interface QSPI 30 16 Freescale Semiconductor MCF5329 Reference Manual Rev 3...
Страница 754: ...UART Modules 31 34 Freescale Semiconductor MCF5329 Reference Manual Rev 3...
Страница 770: ...I2 C Interface 32 16 Freescale Semiconductor MCF5329 Reference Manual Rev 3...
Страница 790: ...Message Digest Hardware Accelerator MDHA 33 20 Freescale Semiconductor MCF5329 Reference Manual Rev 3...
Страница 866: ...Debug Module 36 50 Freescale Semiconductor MCF5329 Reference Manual Rev 3...
Страница 902: ...Register Memory Map Quick Reference A 26 Freescale Semiconductor MCF5329 Reference Manual Rev 3...