tmp19a43fzxbg TOSHIBA Semiconductor CORPORATION, tmp19a43fzxbg Datasheet - Page 338

• Manufacturer Part Number: tmp19a43fzxbg
• Description: 32bit Tx System Risc
• Manufacturer: TOSHIBA Semiconductor CORPORATION

(0xFFFF_F371)
3.15.4
Key Input
Interrupt Detection Timing
Result of Internal Sampling
Bit symbol
Read/Write
After Reset
Function
Detecting Key Inputs and Detection Timing
1)
2)
3)
The following illustrates operation in dynamic pull-up mode:
Key inputs are pulled up only during the T1 periods as specified with T1S1: T1S0.
Dynamic pull-up is repeated at intervals of T2 as specified with T2S1:T2S0.
before detection. The following figure shows an example when the active condition is a falling
edge.
When pull-up resistors are disabled with PE set to 0
edge as the active condition for key inputs. The active condition for key inputs is constantly
monitored.
In static pull-up mode with PE set to 1 and DPE set to 0
edge as the active condition for key inputs. The active condition for key inputs is constantly
monitored.
In dynamic pull-up mode with PE set to 1 and DPE set to 1
period ends. Only edge detection is supported. Therefore, key input must be asserted for at least a
period of T2. In this case, do not set the active condition to a level. There is a delay of up to T2
00: 4/fs (125 μs @ fs=32kHz)
01: 8/fs (250 μs @ fs=32kHz)
10: 16/fs (500 μs @ fs=32kHz)
11: 32/fs (1 ms @ fs=32kHz)
00: 128/fs (4 ms @ fs=32kHz)
01: 256/fs (8 m @ fs=32kHz s)
10: 512/fs (16 ms @ fs=32kHz)
11: 1024/fs (32 ms @ fs=32kHz)
KWUPSTn<KEYn1:0> can be used to specify a High level, Low level, rising edge or falling
KWUPSTn<KEYn1:0> can be used to specify a High level, Low level, rising edge or falling
The active condition for each key input (interrupt) is detected one fs clock cycle before the T1
Must
always be
set to 0.
R/W
T1
⎯
7
0
H or High-Z
Pull-up
Key on wake-up control register KWUPCNT
⎯
⎯
⎯
6
TMP1942CY/CZ-337
Dynamic pull-up
interval
00: 128/fs 10: 512 /fs
01: 256/fs 11: 1024/fs
T2S1
⎯
5
T2
T2S0
Low for T2 or longer
⎯
4
Dynamic pull-up period
00: 4/fs
01: 8/fs
T1S1
⎯
3
R/W
10: 16/fs
11: 32/fs
T1SO
TMP1942CY/CZ
⎯
2
Key input detected
0: Static
1: Dynamic
pull-up
pull-up
DPE
1
0
H or High-Z or L
0: Disable
1: Enable
KYPE
pull-up
pull-up
0
0