RX23T Datasheet, PDF (61/98 Pages) Renesas Technology Corp – 40-MHz 32-bit RX MCUs, built-in FPU, 65.6 DMIPS

RX23T Group
5. Electrical Characteristics
5.3.2
Reset Timing
Table 5.17 Reset Timing
Conditions: VCC = 2.7 V to 5.5 V, AVCC0 = VREFH0 = VCC to 5.5 V, VSS = AVSS0 = VREFL0 = 0 V, T_a = –40 to +105°C
Item
Symbol Min. Typ. Max.
Unit
Test Conditions
RES# pulse width
At power-on
Other than above
Wait time after RES# cancellation (at power-on)
Wait time after RES# cancellation
(during powered-on state)
t_RESWP
3
——
t_RESW
30
—
—
t_RESWT
— 27.5 —
t_RESWT
—
114
—
ms
Figure 5.27
μs
Figure 5.28
ms
Figure 5.27
μs
Figure 5.28
Independent watchdog timer reset period
t_RESWIW
—
1
— IWDT clock Figure 5.29
cycle
Software reset period
t_RESWSW —
1
—
Wait time after independent watchdog timer reset cancellation*¹ t_RESW2 — 300 —
Wait time after software reset cancellation
t_RESW2
—
168
—
ICLK cycle
μs
μs
Note 1. When IWDTCR.CKS[3:0] = 0000b.
VCC
RES#
Internal reset
t_RESWP
Figure 5.27 Reset Input Timing at Power-On
t_RESWT
RES#
Internal reset
Figure 5.28 Reset Input Timing (1)
t_RESW
t_RESWT
Independent watchdog timer reset
Software reset
Internal reset
Figure 5.29 Reset Input Timing (2)
t_RESWIW, t_RESWSW
t_RESWT2
R01DS0248EJ0110 Rev.1.10
Jan 13, 2016
Page 61 of 98