Datex-Ohmeda 7900 - Figure 8-10 Microcontroller Board Schematic Diagram

8 /Schematics
7900 Ventilator- 1503-0151-000 1-97 8-11
Figure 8-10
Microcontroller board schematic diagram, page 4 of 10
XDOUT7
XDOUT6
XDOUT5
XDOUT4
XDOUT3
XDOUT2
XDOUT1
XDOUT0
XDOUT[0:7]
SH5
EXT_SW4
LOW_O2_SW
CHG_DISABLE_340
SH1
AC_LED_A
SH6
TXDB
RXDA
PRES_PAT
SH9
D[0:15]
SH1-3,5,7,8
D0
D1
D2
D3
D4
D5
D6
D12
D14
D15
D13
D11
D10
D9
D8
D7
RD_WR
SH1-3,6
SIB_PWR
SH8
1/8W
1%
R43
10K
R145
10K
1/8W
1%
1%
1/8W
10K
R146
15K
1%
R39
1/8W
15K
1%
R134
1/8W
AC_LED_C
SH6
SP720
U28
XIRQ6
EXT_SW3
4.99K
R37
1%
1/8W
4.99K
R122
1%
1/8W
PWR_IN_EN
SH2
ATOD_BUSY
SH2,8
DAC_RESET
SH1
R135
10K
1/8W
1%
MECH_VENT_EN
SH1,6
74HC14
U48
N15_FAIL
SH10
P15_FAIL
SH10
1/8W
1%
R42
10K
74FCT541
U36
U23
74FCT541
200
R153
1%
1/8W
1%
1/8W
R41
10K
0.1UF
C102
50V
10%
10K
R40
1%
1/8W
RXDB
10%
50V
C107
0.1UF
PAT_RET
SH9
PRES_INSP
SH9
INSP_RET
SH9
PRES_EXP
SH9
EXP_RET
SH9
O2
SH9
O2_RET
SH9
10%
50V
C122
0.1UF
R124
10K
1/8W
1%
1/8W
1%
R33
10K
J2
V_BATT
SH8
I_BATT
SH8
1/8W
15K
1%
R38
R35
1%
15K
1/8W
R36
1%
15K
1/8W
1/8W
15K
1%
R123
1/8W
15K
1%
R30
R34
1%
15K
1/8W
1/8W
15K
1%
R31
1/8W
15K
1%
R110
MAIN_POWER_ON
15K
1%
R143
1/8W
15K
1%
R144
1/8W
10K
R121
1%
1/8W
10K
R111
1%
1/8W
10K
R32
1%
1/8W
DCGO_SW
O2_FLUSH_SW
BAG_VENT_SW
BATT_FULL
CONTROL_IACK6
200
R133
1%
1/8W
R136
1%
15K
1/8W
U29
74FCT541
TXDA
XRESET
EXT_SW2
EXT_SW1
1/8W
1%
R120
10K
CHG_DISABLE
SDA1_INSP
SH5
SCLK_MINUS
SH1
SH1
GIVON_RR
E2_POWER
SH5
SCLK_PLUS
SH1
SDA2_EXP
SH5
RXDA_340
SH1
RXDB_340
SH1
IRQ6
SH1
RESET
SH1,5
TXDB_340
SH1
CNTRL_IACK6
SH1
TXDA_340
SH1
IN12
IN11
IN10
IN9
IN8
V+
IN14
IN13
V-
IN7
IN6
IN5
IN4
IN3
IN2
IN1
1
11
12
13
14
152
3
4
5
6
7
9
10
16
8
VDD
VDD
VDD
43
Y1
Y2
Y3
Y4
Y5
Y6
Y7
Y8
A1
A2
A3
A4
A5
A6
A7
A8
1G 2G
18
17
16
15
14
13
12
11
2
3
4
5
6
7
8
9
119
Y1
Y2
Y3
Y4
Y5
Y6
Y7
Y8
A1
A2
A3
A4
A5
A6
A7
A8
1G 2G
18
17
16
15
14
13
12
11
2
3
4
5
6
7
8
9
119
VDD
VDD
VDD
VDD VDDVDD
VDD
VDD
VDD
49
52
50
48
47
46
45
44
43
42
41
40
9
8
7
6
5
4
39
38
37
36
35
34
33
32
31
30
3
29
28
27
26
25
24
23
22
21
20
2
19
18
17
16
15
14
13
12
11
10
1
51
53
54
55
56
57
58
59
60
VDD
Y1
Y2
Y3
Y4
Y5
Y6
Y7
Y8
A1
A2
A3
A4
A5
A6
A7
A8
1G 2G
18
17
16
15
14
13
12
11
2
3
4
5
6
7
8
9
119
GIVON_RR
SDA1_INSP
SDA2_EXP
DO NOT USE
INTERFACE
EXTERNAL
AC_LED_C
AC_LED_A
SCLK_PLUS
SCLK_MINUS
E2_POWER
DO NOT USE