{
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 "texts": [
  [
   45,
   806,
   "【C6-KEYS】三片 74HC595 —— 15 路侧键 + 5 路 EDL_EN + HUB_RST（2026-09-06 从下板搬来，§26.23）",
   0,
   13
  ],
  [
   45,
   788,
   "链序 U21 → U22 → U33，整条 24 位；SRCLK / RCLK / OE# 三片共用，四根控制线从 J32 北排 3~6 行进来（C1-CONN）。",
   0,
   10
  ],
  [
   45,
   772,
   "先移入的字节落在 U33；固件发送顺序 U33 → U22 → U21，每字节 QH 先发。输出位表见设计文档 §17.2（固件 sr595_key_bit / sr595_edl_bit）。",
   0,
   10
  ],
  [
   45,
   756,
   "供电 +3V3_HUB（U31）。OE# 上拉 100k（R609）：ESP32 复位期间 / 排针没插时 24 路输出全高阻，",
   0,
   10
  ],
  [
   45,
   740,
   "配合每个 MOS 栅极 / EDL_EN 的 100k 下拉（C4-SITEn），15 个按键不会误按、五台手机不会误进 9008。",
   0,
   10
  ],
  [
   720,
   700,
   "HUB_RST 是低有效（USB2517I RESET_N，R716 上拉）：",
   0,
   10
  ],
  [
   720,
   684,
   "影子位 = 1 才是「Hub 正常跑」，上电安全影子是 1<<23 不是 0。",
   0,
   10
  ],
  [
   720,
   660,
   "K*_PWR / K*_VUP / K*_VDN 去 C4-SITE1~5 的按键 MOS 栅极；",
   0,
   10
  ],
  [
   720,
   644,
   "EDL_EN1~5 去 C4-SITE1~5 的 TS5A3157。全是载板内部网络，不再过排针。",
   0,
   10
  ],
  [
   720,
   620,
   "空脚：U21.QE、U22.QA、U22.QE；U33.QH' 是链尾。",
   0,
   10
  ],
  [
   45,
   806,
   "【C6-KEYS】三片 74HC595 —— 15 路侧键 + 5 路 EDL_EN + HUB_RST（2026-09-06 从下板搬来，§26.23）",
   0,
   13
  ],
  [
   45,
   790,
   "链序 U21 → U22 → U33，整条 24 位；SRCLK / RCLK / OE# 三片共用，四根控制线从 J32 北排 3~6 行进来（C1-CONN）。",
   0,
   10
  ],
  [
   45,
   776,
   "先移入的字节落在 U33；固件发送顺序 U33 → U22 → U21，每字节 QH 先发。输出位表见设计文档 §17.2（固件 sr595_key_bit / sr595_edl_bit）。",
   0,
   10
  ],
  [
   45,
   762,
   "供电 +3V3_HUB（U31）。OE# 上拉 100k（R609）：ESP32 复位期间 / 排针没插时 24 路输出全高阻，",
   0,
   10
  ],
  [
   45,
   748,
   "配合每个 MOS 栅极 / EDL_EN 的 100k 下拉（C4-SITEn），15 个按键不会误按、五台手机不会误进 9008。",
   0,
   10
  ],
  [
   720,
   640,
   "HUB_RST 是低有效（USB2517I RESET_N，R716 上拉）：",
   0,
   10
  ],
  [
   720,
   624,
   "影子位 = 1 才是「Hub 正常跑」，上电安全影子是 1<<23 不是 0。",
   0,
   10
  ],
  [
   720,
   600,
   "K*_PWR / K*_VUP / K*_VDN 去 C4-SITE1~5 的按键 MOS 栅极；",
   0,
   10
  ],
  [
   720,
   584,
   "EDL_EN1~5 去 C4-SITE1~5 的 TS5A3157。全是载板内部网络，不再过排针。",
   0,
   10
  ],
  [
   720,
   560,
   "空脚：U21.QE、U22.QA、U22.QE；U33.QH' 是链尾。",
   0,
   10
  ]
 ],
 "nRect": 0,
 "nPoly": 0
}