PRELIMINARY
CYW43340
12.2.2 CIS Select Options
CIS select options are defined in Table 19.
12.3 I/O States
Table 19. CIS Select
OTPEnabled
CIS Source
OTP State
ChipID Source
0
1
Default
OTP if programmed, else default
OFF
ON
Default
OTP if programmed, else default
The following notations are used in Table 20:
■ I: Input signal
■ O: Output signal
■ I/O: Input/Output signal
■ PU = Pulled up
■ PD = Pulled down
■ NoPull = Neither pulled up nor pulled down
Table 20. I/O States
(WL_REG_ON=0
and
Before SW Download (WL_REG_ON=1 and BT_REG_ON=1)
Power-down
(BT_REG_ON and
WL_REG_ON
Held Low)
Out-of-Reset;
Low Power State/
Sleep
(All Power Present)
(BT_REG_ON=1;
WL_REG_ON=1)
BT_REG_ON=0) and and VDDIOs Are
VDDIOs Are Present Present
Power
Rail
Name
I/O Keeper Active Mode
WL_REG_ON
I
N
N
Y
Input; PD (pull-down can Input; PD (pull-down can Input; PD (of 200K)
be disabled) be disabled)
Input; PD (of 200k)
Input; PD (of 200k)
–
–
–
–
BT_REG_ON
CLK_REQ
I
Input; PD (pull down can Input; PD (pull down can Input; PD (of 200K)
be disabled) be disabled)
Input; PD (of 200k)
Input; PD (of 200k)
–
I/O
Open drain or push-pull Open drain or push-pull PD
(programmable). Active (programmable). Active
Open drain.
Active high.
Open drain.
Active high.
BT_VDDO
high.
high
BT_HOST_WAK I/O
E
Y
Y
I/O; PU, PD, NoPull
(programmable)
I/O; PU, PD, NoPull
(programmable)
High-Z, NoPull
High-Z, NoPull
Input, PD
Input, PD
Input, PD
Input, PD
–
–
BT_VDDO
BT_VDDO
BT_DEV_WAKE I/O
I/O; PU, PD, NoPull
(programmable)
Input; PU, PD, NoPull
(programmable)
BT_UART_CTS
BT_UART_RTS
BT_UART_RXD
BT_UART_TXD
I
Y
Y
Y
Y
Input; NoPull
Output; NoPull
Input; PU
Input; NoPull
Output; NoPull
Input; NoPull
Output; NoPull
High-Z, NoPull
High-Z, NoPull
High-Z, NoPull
High-Z, NoPull
Input; PU
Input; PU
Input; PU
Input; PU
Input; PU
Input; PU
Input; PU
Input; PU
–
–
–
–
BT_VDDO
BT_VDDO
BT_VDDO
BT_VDDO
O
I
O
Output; NoPull
Document Number: 002-14943 Rev. *L
Page 54 of 96
CYPRESS [ CYPRESS ]
