AT91SAM9G10-EK Atmel, AT91SAM9G10-EK Datasheet - Page 189
AT91SAM9G10-EK
Manufacturer Part Number
AT91SAM9G10-EK
Description
KIT DEV FOR SAM9G10 ARM
Manufacturer
Atmel
Type
MCUr
Specifications of AT91SAM9G10-EK
Contents
Board, Cables, Power Supply
Silicon Manufacturer
Atmel
Core Architecture
AVR
Kit Contents
Board
Svhc
No SVHC (15-Dec-2010)
Mcu Supported Families
AT91SAM9G10, ARM926EJ-S
Tool / Board Applications
Microcontroller
Rohs Compliant
Yes
For Use With/related Products
*
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
- Current page: 189 of 730
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22.12 Slow Clock Mode
22.12.1
Figure 22-31. Read/write Cycles in Slow Clock Mode
6462A–ATARM–03-Jun-09
NBS0, NBS1,
NBS2, NBS3,
A0,A1
Slow Clock Mode Waveforms
A[25:2]
NWE
MCK
NCS
SLOW CLOCK MODE WRITE
The SMC is able to automatically apply a set of “slow clock mode” read/write waveforms when
an internal signal driven by the Power Management Controller is asserted because MCK has
been turned to a very slow clock rate (typically 32kHz clock rate). In this mode, the user-pro-
grammed waveforms are ignored and the slow clock mode waveforms are applied. This mode is
provided so as to avoid reprogramming the User Interface with appropriate waveforms at very
slow clock rate. When activated, the slow mode is active on all chip selects.
Figure 22-31
chip selects.
1
Table 22-6.
Read Parameters
NRD_SETUP
NRD_PULSE
NCS_RD_SETUP
NCS_RD_PULSE
NRD_CYCLE
NWE_CYCLE = 3
1
Table 22-6
illustrates the read and write operations in slow clock mode. They are valid on all
Read and Write Timing Parameters in Slow Clock Mode
1
Duration (cycles)
indicates the value of read and write parameters in slow clock mode.
0
1
1
2
2
Write Parameters
NWE_SETUP
NWE_PULSE
NCS_WR_SETUP
NCS_WR_PULSE
NWE_CYCLE
NBS0, NBS1,
NBS2, NBS3,
A0,A1
A[25:2]
MCK
NRD
NCS
SLOW CLOCK MODE READ
NRD_CYCLE = 2
1
AT91SAM9G10
Duration (cycles)
1
1
1
0
3
3
189
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