Electrical characteristics (continued) – Rainbow Electronics ATR0635P1 User Manual
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4979D–GPS–06/08
ATR0635P1
6.26
Input pull-up resistor 
NRESET
A7
R
PU
0.5
1.8
k
Ω
A
6.27
Input pull-up resistors TCK, 
TDI, TMS
G9, H10,
G10
R
PU
7
18
k
Ω
A
6.28
Input pull-up resistors P9, 
P13, P22, P31
A11, B10,
C10, D10
R
PU
100
235
k
Ω
A
6.29
Input pull-down resistors 
DBG_EN, NTRST
E8, H11
R
PD
7
18
k
Ω
A
6.30
Input pull-down resistors 
P0, P15, P30
C8, F11,
G12
R
PD
100
235
k
Ω
A
6.31
Configurable input pull-up 
resistors P1, P2, P8, P12, 
P14, P16 to P21, P23 to 
P27, P29
VDDIO = 3.6V
V
PAD
= 0V
R
CPU
50
160
k
Ω
A
6.32
Configurable input 
pull-down resistors P1, P2, 
P8, P12, P14, P16 to P21, 
P23 to P27, P29
VDDIO = 3.6V
V
PAD
= 3.6V
R
CPD
40
160
k
Ω
A
6.33
Configurable input pull-up 
resistor USB_DP (idle state)
C9
R
CPU
0.9
1.575
k
Ω
A
6.34
Configurable input pull-up 
resistor USP_DP (operation 
state)
C9
R
CPU
1.425
3.09
k
Ω
A
6.35
Input pull-down resistors 
USB_DP, USB_DM
C9, D9
R
PD
10
500
k
Ω
A
10. Electrical Characteristics (Continued)
If no additional information is given in column Test Conditions, the values apply to temperature range from –40°C to +85°C.
No. Parameters
Test Conditions
Pin
Symbol
Min
Typ
Max
Unit
Type*
*) Type means: A = 100% tested, B = 100% correlation tested, C = Characterized on samples, D = Design parameter
Notes:
1. The LDO18 is a built in low dropout voltage regulator, which can be used if the host system does not provide the core volt-
age VDD18.
2. The LDOBAT is a built in low dropout voltage regulator, which provides the supply voltage VBAT18 for the RTC, backup
SRAM, P9, P13, P22, P31, NSLEEP and NSHDN. The LDOBAT voltage regulator switches in battery mode if LDOBAT_IN 
falls below 1.5V.
3. Supply voltage VBAT18 for backup domain is generated internally by the LDOBAT.
4. If no current is caused by outputs (pad output current as well as current across internal pull-up resistors)
