Freescale Semiconductor, Inc.
Ge ne ra l Re le a se Sp e c ific a tion — MC68HC05CT4
Se c tion 6. Op e ra ting Mod e s
6.1 Conte nts
6.2
6.3
Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .49
Single-Chip Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .50
6.4
Low-Power Modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .50
Stop Mode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .50
Stop Recovery. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .51
Wait Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .51
Low-Power Wait . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .52
6.4.1
6.4.2
6.4.3
6.4.4
6.2 Introd uc tion
The MCU has two modes of operation: single-chip mode and self-check
mode with two oscillator options. Table 6-1 shows the conditions
required to go into each mode.
Table 6-1. Operating Mode Conditions
RESET
IRQ
–V
PB1
–V
PD5
–V
MODE
V
V
V
Single-Chip
Self-Check
SS
DD
SS
DD
SS
DD
VTST = 2 x VDD
VTST
VDD
VSS
MC68HC05CT4 — Rev. 2.0
General Release Specification
Operating Modes
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