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3. TECHNICAL BRIEF
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Figure 3-17. AD6537B POWER MODE LOGIC
2. LDO Block
1. There are 8LDOs in the AD6537B.
- VCORE
: supplies Digital Baseband Processor core and AD6537 digital core
(1.8V, 80mA)
- VMEM
: supplies external memory and the interface to the external memory on
the digital baseband processor (1.8V or 2.8V, 150mA)
- VEXT
: supplies Radio digital interface and high voltage interface (2.8V,
170mA)
- VSIM
: supplies the SIM interface circuitry on the digital processor and SIM
card (1.8V or 2.85V, 20mA)
- VRTC
: supplies the Real-Time Clock module (1.8 V, 200 µA)
- VABB
: supplies the analog portions of the AD6537
- VMIC
: supplies the microphone interface circuitry (2.5 V, 1 mA)
- VVCXO
: supplies the voltage controlled crystal oscillator ( 2.75 V, 10 mA)
AD6537B
THERM
Thermal
Shutdown
DDLO
UVLO
CHGDET
VBAT
KEYON
DBBON
VRTC
VEXT
VCXDEN
POWERMODE
Enable
Mode
Enable
Mode
Enable
Mode
Enable
Mode
Enable
Digital core
LDO Regulator
Memory Interface
LDO Regulator
External Interface
LDO Regulator
SIM Interface
LDO Regulator
VCXO
LDO Regulator
VCORE Comparator
VMEM Comparator
VEXT Comparator
VCORE
VMEM
VEXT
VCORECP
VMEMCP
VEXTCP
low: VCORE < 1.5V
high: VCORE > 1.5V
high: VMEM > 2.5V or 1.5V
low: VMEM < 2.5V or 1.5V
high: VEXT > 2.5V
low: VEXT < 2.5V
VCORE
VMEM
VEXT
VSM
VVCXO
VSMEn
Control Bit
Summary of Contents for C1100
Page 1: ...Service Manual Model C1100 Service Manual C1100 P N MMBD0034301 Date June 2004 Issue 1 0 ...
Page 84: ... 83 5 DISASSEMBLY INSTRUCTION Figure 5 3 ...
Page 85: ... 84 Figure 5 4 5 DISASSEMBLY INSTRUCTION ...
Page 86: ... 85 5 DISASSEMBLY INSTRUCTION Figure 5 5 Figure 5 6 ...
Page 87: ... 86 5 DISASSEMBLY INSTRUCTION Figure 5 7 Figure 5 8 3 1 1 2 ...
Page 88: ... 87 Figure 5 9 5 DISASSEMBLY INSTRUCTION ...
Page 89: ...5 DISASSEMBLY INSTRUCTION 88 Figure 5 10 Figure 5 11 ...
Page 90: ...5 DISASSEMBLY INSTRUCTION 89 Figure 5 12 3 2 1 ...
Page 106: ... 105 9 PCB LAYOUT 9 PCB LAYOUT ...
Page 107: ... 106 9 PCB LAYOUT ...
Page 114: ... 113 Figure 11 1 HW test program Figure 11 1 HW test program 11 STAND ALONE TEST ...
Page 119: ... 118 Note ...