User's Manual

COMPANY CONFIDENTIAL
Preliminary Datasheet
28
5. Schematic Reference Design
Following is the Evaluation board schematics for reference.
Module pinout & 32.768kHz
BT_UART_CTS_N BT_UART_RTS_N
BT_UART_RXD
BT_UART_TXD
BT_PCM_IN BT_PCM_OUT
BT_REG_ON
IRQ line to host processor
VBAT 3.3V
C18
10uF
C-0805
1
2
C17
0.1uF
C-0603S0
1
2
C2
10uF
C-0805
1
2
R1
0ohm
R-0603S0
12
C3
1uF
C-0603S0
1
2
C4
10nF
C-0402S0
1
2
GPIO0_WL_HOST_WAKE
WL_REG_ON
3.3V
Y1
XTAL-7B25000001
1
2
3
4
C1
NL
C-0402S0
1
2
R2
221ohm
R-0402S0
12
SDIO Trace impedance is 50ohm
R39
10Kohm
R-0603S0
1
2
3.3V
3.3V
R41
10Kohm
R-0603S0
1
2
SDIO_D2
SDIO_D3
SDIO_CMD
SDIO_D0
SDIO_D1
SDIO_CLK
BT_PCM_SYNC
T77H506.00
Reserv ed15
43
Reserved9
19
Reserv ed14
42
SDIO_DAT3
47
GND6
6
3.3V1
4
3.3V2
5
Reserved1
1
Reserved2
2
Reserved3
3
I2C_DATA
10
COEX1
11
ALERT
8
Reserved7
16
GND17
17
Reserved8
18
GND23
23
Reserved12
24
Reserv ed16
44
W_DISABLE#1
28
CLKREQ#
30
PERST#
31
REFCLKP0
34
PEWAKE#
29
SDIO_Reset
45
Reserved4
7
GND32
32
SDIO_Wake
46
SDIO_DAT2
48
SDIO_DAT1
49
SDIO_CMD
51
SDIO_CLK
52
I2C_CLK
9
GND20
20
Reserved10
21
Reserved11
22
GND35
35
PETn0
36
PETp0
37
SDIO_DAT0
50
REFCLKN0
33
SUSCLK(32kHz)
27
GND26
26
Reserved13
25
COEX2
12
COEX3
13
Reserved5
14
Reserved6
15
GND38
38
PERn0
39
PERp0
40
GND41
41
UART_WAKE
53
UART_CTS
54
UART_Tx
55
UART_Rx
56
UART_RTS
57
PCMFR1
58
BT_PCMIN
59
PCMOUT
60
PCMCLK
61
GND62
62
W_DISABLE#2
63
LED#2
64
LED#1
65
Reserved17
66
Reserved18
67
GND68
68
USB_D-
69
USB_D+
70
GND71
71
3.3V3
72
3.3V4
73
GND74
74
GND75
75
GND76
76
GND77
77
GNDG1
G1
GND78
78
GND79
79
GND80
80
GND81
81
GND82
82
GND83
83
GND84
84
GND85
85
GND86
86
GND87
87
GND88
88
GND89
89
GND90
90
GND91
91
GND92
92
GND93
93
GND94
94
GND95
95
GND96
96
GNDG2
G2
GNDG3
G3
GNDG4
G4
GNDG5
G5
GNDG6
G6
GNDG7
G7
GNDG8
G8
GNDG9
G9
GNDG10
G10
GNDG11
G11
GNDG12
G12
BT_PCM_CLK
VBAT 3.3V
C23
10uF
C-0805
1
2
C24
0.1uF
C-0603S0
1
2
BT_HOST_WAKE
5-1 Low Power Clock
The T77H506 module uses a secondary low frequency clock for low power mode timing. A precision external
32.768 KHz clock that meets the specifications listed in Table 3 is required by BCM4324.
Table 3: External 32.768K Low Power Oscillator Specifications
Specification
Paramete
r
Conditions/
Notes
Min Typ Max
Units
Frequency 32748 32768 32788 Hz
Input
signal
amplitude
25 ℃
200 1800 mV, p-p
Duty
cycle
Square
waveor
30 - 70 %