TMP91C824
91C824-8
2008-02-20
Table 2.3.3 Pin Names and Functions (3/3)
Pin Name
Number
of Pins
I/O Functions
PC2
SCLK0
CTS0
1 I/O
I/O
Input
Port C2: I/O port
Serial 0 clock
Serial data send enable 0 (Clear to send)
PC3
TXD1
1 I/O
Output
Port C3: I/O port
Serial 1 send data
Open-drain output pin by programmable
PC4
RXD1
1 I/O
Input
Port C4: I/O port
Serial 1 receive data
PC5
SCLK1
CTS1
1 I/O
I/O
Input
Port C5: I/O port
Serial clock I/O 1
Serial 1 data send enable (Clear to send)
XT1
1
Input
Low-frequency oscillator connecting pin
XT2
1
Output
Low-frequency oscillator connecting pin
PD5
SCOUT
1 Output
Output
Port D5: Output port
System clock output: f
SYS
or fs output
PD6
ALARM
MLDALM
1 Output
Output
Output
Port D6: Output port
RTC alarm output pin
PD7
MLDALM
1 Output
Output
Port D7: Output port
Melody/alarm output pin
NMI
1 Input
Non-maskable interrupt request pin: Interrupt request pin with
programmable falling edge level or with both edge levels programmable
AM0 to AM1
2
Input
Operation mode:
Fixed to AM1
=
0, AM0
=
1 16-bit external bus or 8-/16-bit dynamic sizing.
Fixed to AM1
=
0, AM0
=
0 8-bit external bus fixed.
EMU0 1
Output
Open
pin
EMU1 1
Output
Open
pin
RESET
1
Input
Reset: Initializes TMP91C824 (with pull-up resistor).
VREFH
1
Input
Pin for reference voltage input to AD converter (H)
VREFL
1
Input
Pin for reference voltage input to AD converter (L)
AVCC
1
Power supply pin for AD converter
AVSS
1
GND pin for AD converter (0 V)
X1/X2
2
High-frequency oscillator connection pins
DVCC
2
Power supply pins (All VCC pins should be connecyed with the power
Supply pin.)
DVSS
2
GND pins (0 V) (All pins shuold be connected with GND (0 V).)