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AS8201 Datasheet PDF : 13 Pages
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TTP/C-C1 Communications Controller Data Sheet
AS8201
Austria Mikro Systeme International AG
Pin Description
PinNr. Pin Name
1
VDD
2
VSS
3-18 RAM_DATA[0:15]
19 VDD
20 VSS
21 RAM_OEB
22 RAM_WEB
23 RAM_READYB
24 TIME_OVERFLOW
25 TIME_SIGNAL
26 TIME_TICK
27 MICROTICK
28 XENA0
29 VDD
30 VSS
31 XIN0
32 XOUT0
33 VSS
34 VDD
35 OE[0]
36 RXD[0]
37 TXD[0]
38 CTS[0]
39 BDE[0]
40 RESETB
41
42
43
44-50
TEST_SE
FTEST
FTEST_IEN
LED[0:6]
51 OE[1]
52 RXD[1]
53 TXD[1]
54 CTS[1]
55 BDE[1]
56 XENA1
57 VDD
58 VSS
59 XIN1
60 XOUT1
61 VSS
62 VDD
Dir Description
P positive power supply
P negative power supply
I/O DPRAM data bus, tristate
P positive power supply
P negative power supply
I DPRAM output enable, active low
I DPRAM write enable, active low
O DPRAM ready, active low, indicates read/write operation finished
O CNI control signal, overflow of global time
O CNI control signal, CNI time signal
O CNI clock signal, macrotick, typically about 1us at 20 MHz clock.
O output of main clock, inverted to signal applied at pin XOUT0.
I oscillator 0 (main clock) enable, active low.
P positive power supply
P negative power supply
A analog pad from oscillator / use as input when providing external
clock
A analog pad from oscillator / leave open when providing external
clock
P positive power supply
P negative power supply
I channel [0]: transmitter output enable
IPU channel [0]: receiver input
O channel [0]: transmit data
O channel [0]: transmitter clear to send
O channel [0]: bus driver enable
I (1) main reset input signal, active low. When connected the in-
ternal power-on reset function is overridden
(2) if unconnected: an internal reset is generated after power-on.
Reset pulse duration typically 24 us.
IPD test input: scan enable, active high
IPD test input: functional test mode, active high
IPD test input: instruction insertion enable, active high
O test outputs:
(1) in production test used as scan chain outputs
(2) in operation: can be used as generic output port, e.g. to drive
LEDs
I channel [1]: transmitter output enable
IPU channel [1]: receiver input
O channel [1]: transmit data
O channel [1]: transmitter clear to send
O channel [1]: bus driver enable
I oscillator 1 (bus guardian) enable, active low.
P positive power supply
P negative power supply
A analog pad from oscillator / use as input when providing external
clock
A analog pad from oscillator / leave open when providing external
clock
P positive power supply
P negative power supply
Rev. NC, October 1999
Page 4 of 13
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