
15
TSPC603R
2125A
–
HIREL
–
04/02
Several methods of returning to full-power mode:
- Assert INT, SMI, or MCP interrupts
- Assert hard reset or soft reset
PLL may be disabled and SYSCLK may be removed while in sleep mode.
Return to full-power mode after PLL and SYSCLK disabled in sleep mode:
- Enable SYSCLK
- Reconfigure PLL into desired processor clock mode
- System logic waits for PLL startup and relock time (100
μ
sec)
- System logic asserts one of the sleep recovery signals (for example, INT or SMI)
Power Management Software
Considerations
Since the 603r is a dual issue processor with out-of-order execution capability, care
must be taken in how the power management mode is entered. Furthermore, nap and
sleep modes require all outstanding bus operations to be completed before the power
management mode is entered. Normally during system configuration time, one of the
power management modes would be selected by setting the appropriate HID0 mode bit.
Later on, the power management mode is invoked by setting the MSR[POW] bit. To pro-
vide a clean transition into and out of the power management mode, the
stmsr
[POW]
should be preceded by a
sync
instruction and followed by an
isync
instruction.
Power Dissipation
Notes:
1. These values apply for all valid PLL_CFG[0-3] settings and do not include output driver power (OV
DD
) or analog supply
power (AV
DD
). OV
DD
power is system dependent but is typically
≤
10% of V
DD
. Worst-case AV
DD
= 15 mW.
2. Typical power is an average value measured at V
DD
= AV
DD
= 2.5V, OV
V
= 3.3V, in a system executing typical applications
and benchmark sequences.
3. Maximum power is measured at V
DD
= 2.625V using a worst-case instruction mix.
4. To calculate the power consumption at low temperature (-55
°
C),
use a factor of 1.25
.
Table 9.
Power Dissipation
(1)(2)(3)(4)
V
DD
/A
V
DD
= 2.5
±
5%V, O
V
DD
= 3.3
±
5%V, GND = 0V, 0
°
C
≤
T
C
≤
125
°
C
CPU Clock Frequency
166 MHz
200 MHz
233 MHz
266 MHz
300 MHz
Units
Full-on Mode (DPM Enabled)
Typical
2.1
2.5
3.0
3.5
4.0
W
Max
3.2
4.0
4.6
5.3
6.0
W
Doze Mode
Typical
1.5
1.7
1.8
2.0
2.1
W
Nap Mode
Typical
100
120
140
160
180
mW
Sleep Mode
Typical
96
110
123
135
150
mW
Sleep Mode-PLL Disabled
Typical
60
60
60
60
60
mW
Sleep Mode-PLL and SYSCLK Disabled
Typical
25
25
25
25
25
mW
Maximum
60
60
60
80
100
mW