A5191HRT AMIS HART™ Modem
Table 1: Pinout Summary 28-Pin PLCC, A5191HRTP/Pg (12197-504/508)
Pin No. Signal Name Type
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
TEST1
TEST2
TEST3
TEST4
TEST5
INRESET
TEST7
TEST8
TEST9
OTXA
IAREF
ICDREF
OCBIAS
TEST10
VDDA
IRXA
ORXAF
IRXAC
OXTL
IXTL
VSS
VDD
INRTS
ITXD
TEST11
ORXD
OCD
TEST12
Input
-
-
-
Input
Input
Input
Input
Input
Pin Description
Connect to V
SS
No connect
No connect
No connect
Connect to V
SS
Reset all digital logic when low
Connect to V
SS
Connect to V
SS
Connect to V
SS
8
Output transmit analog, FSK modulated HART
Output
transmit signal to 4-20mA loop interface circuit
Input
Input
Analog reference voltage
Carrier detect reference voltage
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
IAREF
ICDREF
OCBIAS
TEST10
VSSA
VDDA
IRXA
ORXAF
IRXAC
OXTL
IXTL
VSSA
VSS
VDD
INRTS
ITXD
TEST11
ORXD
OCD
TEST12
TEST1
TEST2
VDD
TEST3
TEST4
Input
Input
3
4
5
6
7
TEST7
TEST8
TEST9
VSS
OTXA
Input
Input
Input
Data Sheet
Table 2: Pinout Summary 32-Pin LQFP, A5191HRTL/Lg (12197-503/507)
Pin No. Signal Name
1
2
TEST5
INRESET
Type
Input
Input
Pin Description
Connect to V
SS
Reset all digital logic when low, connect to V
DD
for normal operation
Connect to V
SS
Connect to V
SS
Connect to V
SS
Output transmit analog, FSK modulated HART
transmit signal to 4-20mA loop interface circuit
Analog reference voltage
Carrier detect reference voltage
Ground Digital ground
Output
Output Comparator bias current
Input Connect to V
SS
Ground Analog ground
Power Analog supply voltage
Input
FSK modulated HART receive signal from
4-20mA loop interface circuit
Analog receive comparator input
Crystal oscillator input
Output Comparator bias current
Connect to V
SS
Input
Power
Input
Analog supply voltage
FSK modulated HART receive signal from
4-20mA loop interface circuit
Analog receive comparator input
Crystal oscillator input
Digital supply voltage
Request to sent
Input transmit date, transmitted HART data
stream from UART
No connect
Output Analog receive filter output
Input
Input
Output Crystal oscillator output
Ground Analog ground
Ground Digital ground
Power Digital supply voltage
Input
Input
-
Request to send
Input transmit data, transmitted HART data
stream from UART
No connect
Output Analog receive filter output
Input
Input
Power
Input
Input
-
Output Crystal oscillator output
Ground Ground
Output Received demodulated HART data to UART
Output Carrier detect output
-
No connect
Output Received demodulated HART data to UART
Output Carrier detect output
-
Input
-
-
-
No connect
Connect to V
SS
No connect
No connect
No connect
Power Digital supply voltage
AMI Semiconductor - Rev. 2.0, Mar. 05
www.amis.com
2
AMI [ AMI SEMICONDUCTOR ]
