ISP1161A1BD,151 STEricsson, ISP1161A1BD,151 Datasheet - Page 110

• Manufacturer Part Number: ISP1161A1BD,151
• Manufacturer: STEricsson

Specifications of ISP1161A1BD,151

• Lead Free Status / RoHS Status: Supplier Unconfirmed

ISP1161A1_4
Product data sheet
Fig 45. Oscillator circuit with external crystal.
Fig 47. Oscillator and LazyClock logic.
CLKDIV [ 3:0 ]
configuration
CLKRUN
NOLAZY
hardware
register
ISP1161A1
.
.
.
.
.
.
CLKOUT
XTAL2
XTAL1
The 6 MHz oscillator frequency is multiplied to 48 MHz by an internal PLL. This frequency
is used to generate a programmable clock output signal at pin CLKOUT, ranging from
3 MHz to 48 MHz.
In ‘suspend’ state the normal CLKOUT signal is not available, because the crystal
oscillator and the PLL are switched off to save power. Instead, the CLKOUT signal can be
switched to the LazyClock frequency of 100 kHz
The oscillator operation and the CLKOUT frequency are controlled via the
DcHardwareConfiguration register, as shown in
The following bits are involved:
For details about the DC’s interrupt logic, see
•
•
•
CLKRUN switches the oscillator on and off
CLKDIV[3:0] is the division factor determining the normal CLKOUT frequency
NOLAZY controls the LazyClock signal output during ‘suspend’ state.
SUSPEND
6 MHz
18 pF
18 pF
004aaa190
XTAL OSC
Rev. 04 — 29 January 2009
4
enable
6 MHz
Fig 46. Oscillator circuit using external oscillator.
LAZYCLOCK
PLL 8
enable
enable
USB single-chip host and device controller
48 MHz
ISP1161A1
100 (±50 %) kHz
Section
CLKOUT
Figure
XTAL2
XTAL1
50 %.
(N + 1)
8.6.3.
47.
N
n.c.
MGS775
0
1
V CC
ISP1161A1
NOLAZY
© ST-NXP Wireless 2009. All rights reserved.
OSC
CLKOUT
Out
004aaa191
6 MHz
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