TMP86CM29LUG datasheet(49/198 Pages) TOSHIBA

49 / 198 page

Page 35

TMP86CM29LUG

Figure 2-16 Reset Circuit

2.3.2 Address trap reset

If the CPU should start looping for some cause such as noise and an attempt be made to fetch an instruction

from the on-chip RAM (when WDTCR1<ATAS> is set to “1”), DBR or the SFR area, address trap reset will be

generated. The reset time is maximum 24/fc + 210/fc[s] (65.5

µs at 16.0 MHz). Then, the RESET pin outputs "L"

level during maximum 24/fc[s].

Note:The operating mode under address trapped is alternative of reset or interrupt. The address trap area is alter-

native.

Note 1: Address “a” is in the SFR, DBR or on-chip RAM (WDTCR1<ATAS> = “1”) space.

Note 2: During reset release, reset vector “r” is read out, and an instruction at address “r” is fetched and decoded.

Note 3: Varies on account of external condition: voltage or capacitance

Figure 2-17 Address Trap Reset

2.3.3 Watchdog timer reset

Refer to Section “Watchdog Timer”.

2.3.4 System clock reset

If the condition as follows is detected, the system clock reset occurs automatically to prevent dead lock of the

CPU. (The oscillation is continued without stopping.)

- In case of clearing SYSCR2<XEN> and SYSCR2<XTEN> simultaneously to “0”.

- In case of clearing SYSCR2<XEN> to “0”, when the SYSCR2<SYSCK> is “0”.

- In case of clearing SYSCR2<XTEN> to “0”, when the SYSCR2<SYSCK> is “1”.

The flash reset occurs immediately after the system clock reset operation. The reset time is maximum 24/fc +

210/fc (65.5

µs at 16.0 MHz). Then, the RESET pin outputs "L" level during maximum 24/fc[s] (1.5µs at

16.0MHz).

Internal reset

Flash reset counter

RESET

VDD

Malfunction

reset output

circuit

Watchdog timer reset

Address trap reset

System clock reset

Instruction at address r

16/fc [s]

Maximum 24/fc [s]

Instruction

execution

Internal reset

signal

RESET output

JP a

Reset release

Address trap is occurred

("L" output)

4/fc to 12/fc [s]

210/fc [s]

Note 3

TMP86CM29LUG bảng dữ liệu(PDF) 49 Page - Toshiba Semiconductor

TMP86CM29LUG bảng dữ liệu(HTML) 49 Page - Toshiba Semiconductor

Html Pages

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 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 ...More

bảng dữ liệu tải về

Link URL