S912XHZ512F1VAG Datasheet, PDF (755/978 Pages) Freescale Semiconductor, Inc – Covers MC9S12XHZ384, MC9S12XHZ256

BDM Clock
(Target MCU)
Host
Drive to
BKGD Pin
Target System
Speedup
Pulse
Perceived
Start of Bit Time
BKGD Pin
Chapter 21 Background Debug Module (S12XBDMV2)
High-Impedance
High-Impedance
R-C Rise
High-Impedance
10 Cycles
10 Cycles
Host Samples
BKGD Pin
Figure 21-9. BDM Target-to-Host Serial Bit Timing (Logic 1)
Earliest
Start of
Next Bit
MC9S12XHZ512 Data Sheet Rev. 1.06
Freescale Semiconductor
755