Sony ICD-B25 Service Manual page 20

ICD-B25
• IC Block Diagrams
IC102 AN6123MS-TXL
5 4 3
GM DET
1 2
IC107 PCM3500E-2K
24 23 22 21 20 19 18
POWER
SUPPLY
LPF ∆-∑ MOD OVER SAMPLING
OUTPUT AMP DAC DIGITAL FILTER
MODE
REF V
CONT
ANALOG ∆-∑ MOD
FRONT END ADC DIGITAL FILTER
1 2 3 4 5 6 7
IC108 XC25BS5005MR
11BIT
CE 1 6 CLK IN
PLL
GND 2 1/4 1/2 5 VDD
Q0 3 4 Q1
IC105, 106 TC7S04FU (TE85R)
NC 1 5 VCC
IN A 2 4 OUT Y
3
GND
17 16 15 14 13
CLOCK
LOOP SERIAL
BACK I/O I/F
HPF
8 9 10 11 12
IC715 BU2090FS-E2
16 15 14 13 12 11 10
12 BIT
CONTROL
SHIFT
CIRCUIT
REGISTER
OUTPUT
12 BIT
BUFFER
STORAGE
(OPEN DRAIN)
REGISTER
1 2 3 4 5 6 7 8 9
IC716 RS5C348A-E2
32 kHz
32KOUT 1
OUTPUT
COMPARATOR
CONTROL
COMPARATOR
SCLK 2
ADDRESS
REGISTER
SO 3
I/O
CONTROL
SHIFT
SI 4
REGISTER
VSS 5
20 20
ALARM W REGISTER
VDD
(WEEK, MIN, HOUR)
W
ALARM D REGISTER
10 VDD
(MIN, HOUR)
D
TIMER COUNTER
9 OSCIN
DIVIDER
SEC, MIN, HOUR, WEEK, DIV OSC
CORRECTION
8 OSCOUT
DAY, MONTH, YEAR
ADDRESS
DECODER
INTERRUPT
CONTROL
OSC
DETECT
VOLTAGE
DETECT
7 CE
6 INTR