SAF-C161U-LF V1.3 Infineon Technologies, SAF-C161U-LF V1.3 Datasheet - Page 163

• Manufacturer Part Number: SAF-C161U-LF V1.3
• Description: IC MCU ISDN 16BIT TTL TQFP-100
• Manufacturer: Infineon Technologies
• Series: C16xxr

Specifications of SAF-C161U-LF V1.3

• Core Processor: C166
• Core Size: 16-Bit
• Speed: 36MHz
• Connectivity: EBI/EMI, SPI, UART/USART, USB
• Peripherals: POR, PWM, WDT
• Number Of I /o: 56
• Program Memory Type: ROMless
• Ram Size: 3K x 8
• Voltage - Supply (vcc/vdd): 3 V ~ 3.6 V
• Oscillator Type: External
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 100-LFQFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Program Memory Size: -
• Data Converters: -
• Other names: SAFC161ULFV1.3X; SAFC161ULFV13XP; SP000007502

Pin P3.12 (BHE/WRH) is one more pin with an alternate output function. However, its
structure is slightly different (see figure below), because after reset the BHE or WRH
function must be used depending on the system startup configuration. In these cases
there is no possibility to program any port latches before. Thus the appropriate alternate
function is selected automatically. If BHE/WRH is not used in the system, this pin can be
used for general purpose I/O by disabling the alternate function (BYTDIS = ‘1’ /
WRCFG=’0’).
Figure 37
Note: Enabling the BHE or WRH function automatically enables the P3.12 output driver.
Data Sheet
B
a
n
e
n
u
s
r
t
l
x = 15, 12
Setting bit DP3.12=’1’ is not required.
During bus hold pin P3.12 is switched back to its standard function and is then
controlled by DP3.12 and P3.12. Keep DP3.12 = ’0’ in this case to ensure floating
in hold mode.
Block Diagram of Pins P3.15 (CLKOUT) and P3.12 (BHE/WRH)
Port Output
Write DP3.x
Read DP3.x
Direction
Read P3.x
Write P3.x
Latch
Latch
MUX
1
0
Alternate
Output
Data
Alternate
Function
Enable
’1’
163
1
1
0
0
MUX
MUX
Clock
Latch
Input
Output
Buffer
MCB02073
Parallel Ports
P3.12/BHE
P3.15/CLKOUT
2001-04-19
C161U